Today’s Passage: Genesis 17
Thirteen quiet years have gone by since the end of the last chapter, thirteen years in which the Bible says almost nothing, and now the silence breaks. Abram is ninety-nine years old, an old man well past the age of hoping for children, and the LORD appears to him again and speaks the promise once more, only larger and firmer than ever. He gives Himself a name Abram has not heard before, God Almighty, and He binds Himself to this one man in a covenant that will never end. Then He does three things a man cannot do for himself. He changes Abram’s name to Abraham, father of a multitude. He gives the covenant a mark in the body, so that every male in the household is to be circumcised. And He renames old Sarai as Sarah and promises, plainly and impossibly, that she herself will hold a son within the year. Abraham falls on his face, and he laughs, and out of that laughter God draws the name of the very child He has promised: Isaac, he laughs. So read this chapter as the day God signed His name to a promise and would not let go of it.
As you read, hold this: God bound Himself to Abraham forever, and sealed the promise in a new name and in the flesh.
Context The world of Genesis 17
To feel the weight of this chapter you have to feel the years behind it. Back in chapter 15 God had cut a covenant with Abram and counted his faith as righteousness, and in chapter 16, tired of waiting, Abram and Sarai had tried to help the promise along through Hagar, and Ishmael was born. Then the text falls silent for thirteen long years. Ishmael grows from an infant into a boy, Abram slides from eighty-six toward a hundred, and every passing birthday makes the promised son look more like a thing that will never come. It is into that long, wearing silence that God speaks again.
In the ancient world a covenant was the most solemn bond two parties could make, far stronger than a promise given by word of mouth. It was often sealed with a sign, something you could see and point to, a lasting mark that said an agreement had been struck and would be kept. Kings changed the names of those they took into their service, because to name a thing was to claim it and to set its course. So when God renames Abram and gives the covenant a sign in the flesh, He is speaking a language His world understood at once. This is not a casual encouragement. It is a binding, signed and sealed.
One thing must be kept clear from the start, because the whole chapter leans on it. Circumcision here is not how Abraham earns the covenant or buys the promise. God had already given the covenant by grace and Abraham had already received it by faith, back in chapter 15, long before any knife was lifted. The sign comes afterward, as the seal on a gift already given, the outward mark of an inward trust. Keep that order in mind, because Scripture will make much of it later.
Genesis 17:1-8 (BSB)
¹ When Abram was ninety-nine years old, the LORD appeared to him and said, “I am God Almighty. Walk before Me and be blameless. ² I will establish My covenant between Me and you, and I will multiply you exceedingly.” ³ Then Abram fell facedown, and God said to him, ⁴ “As for Me, this is My covenant with you: You will be the father of many nations. ⁵ No longer will you be called Abram, but your name will be Abraham, for I have made you a father of many nations. ⁶ I will make you exceedingly fruitful; I will make nations of you, and kings will descend from you. ⁷ I will establish My covenant as an everlasting covenant between Me and you and your descendants after you, to be your God and the God of your descendants after you. ⁸ And to you and your descendants I will give the land where you are residing—all the land of Canaan—as an eternal possession; and I will be their God.”
Listen first to the name God gives Himself, because it sets the tone for everything that follows. I am God Almighty, He says, and to a childless old man that is exactly the name he needs to hear. The One speaking is not limited by Abram’s age or Sarai’s barren years or the thirteen empty seasons behind them. He is God enough for the thing He is about to promise. And then comes the call that fits under that name: walk before Me and be blameless. Not walk in order to earn the covenant, but walk before the God who is already giving it, live your days in the open sight of the One who has bound Himself to you.
Then the promise pours out, and notice how much of it God takes upon Himself. I will establish, I will multiply, I will make you fruitful, I will make nations of you, I will give you the land. Over and over it is God who acts and Abram who receives. And in the middle of it He does something only God can do to a man. He reaches into Abram’s very name and changes it. Abram means exalted father, which for a man with one son by a servant was almost a sad name to carry. God makes it Abraham, pronounced av-rah-HAM,. Strong's H85, father of a multitude (proper name). Given in place of Abram, which already meant something like exalted father, hope enough for a man with a household but no true heir. Names in the Bible are rarely just labels; they say what a person is or what he is meant to become, and God stretches Abram into Abraham, father of a multitude, with the wonder of it hanging on the timing. He hands over the new name before the promised son is even conceived, so that every single time anyone called out to him, morning and evening, they would be speaking God’s promise back over his life. Imagine it: a hundred-year-old man, one boy in his tent, and a name on everyone’s lips that means father of nations. To carry that name was to carry the covenant itself, sounded aloud a dozen times a day. , father of a multitude, and He speaks it as already done, for I have made you a father of many nations. The old man has not yet held the promised child, and already God has renamed him for the crowd that is coming. That is how sure this covenant is: an everlasting one, God says, running down through the generations, and with it the land of Canaan given as a lasting home.
Word study "God Almighty": El Shaddai (Genesis 17:1)
Hebrew: אֵל שַׁדַּי (El Shaddai), pronounced ale shah-DAI. The key word is שַׁדַּי (Shaddai), Strong’s H7706.
This is the name God chooses for the exact moment when the promise looks most impossible. Its precise root is debated by careful scholars, but across the Bible it carries the sense of overwhelming might, of a God powerful enough to overrule nature itself and bring life where there was none. That is why it lands here with such comfort. A man of ninety-nine and a woman of ninety have run clean out of their own strength, and just then God names Himself the Almighty, the One for whom a barren womb is no obstacle at all. The name is not a boast. It is a promise wrapped in a title: the God who is speaking is the God who is able.
Genesis 17:9-14 (BSB)
⁹ God also said to Abraham, “You must keep My covenant—you and your descendants in the generations after you. ¹⁰ This is My covenant with you and your descendants after you, which you are to keep: Every male among you must be circumcised. ¹¹ You are to circumcise the flesh of your foreskin, and this will be a sign of the covenant between Me and you. ¹² Generation after generation, every male must be circumcised when he is eight days old, including those born in your household and those purchased from a foreigner—even those who are not your offspring. ¹³ Whether they are born in your household or purchased, they must be circumcised. My covenant in your flesh will be an everlasting covenant. ¹⁴ But if any male is not circumcised, he will be cut off from his people; he has broken My covenant.”
Now the covenant is given a sign, a mark cut into the body itself. And here we must hold the order of things very carefully, because it is easy to get backwards. The covenant is God’s gift, given and received by faith already; circumcision is its sign, the seal stamped onto a promise that was true before the mark was ever made. God does not say, circumcise yourselves so that I will be your God. He has already said He is their God, and this is the outward token of it. Think of it as a ring rather than a wage. It does not purchase the bond. It shows the bond is real.
And see how personal and how lasting God means it to be. It is cut into the flesh, in the most intimate part of a man, the very part through which the promised descendants would come, so that the sign of the berit, pronounced beh-REET. Strong's H1285, covenant, a solemn binding agreement. This is the drumbeat of the whole chapter, struck again and again, thirteen times in these few verses. A solemn, binding bond between two parties, the most serious commitment the ancient world knew, and it was often made by cutting, an animal divided in two or, here, a mark cut into the flesh. That is no accident of language, for the very phrase in Hebrew for making a covenant is literally to cut a covenant. What matters most is who does the binding here. Again and again God says My covenant, I will establish, an everlasting covenant. The weight of it rests on His faithfulness, not on Abraham’s. And a bond that rests on the faithfulness of God is a bond that will hold when everything human in it has failed. would be carried in the same body that carried the future. It is given to the eight-day-old infant, before that child could do a single thing to deserve it, which says again that this belongs to grace and not to earning. And it reaches beyond Abraham’s own blood to every servant born in his house or bought from a foreigner, a quiet early hint that this covenant was always meant to gather in more than one family. The mark on the body was to preach, silently, generation after generation, that these were a people God had claimed for His own.
Genesis 17:15-16 (BSB)
¹⁵ Then God said to Abraham, “As for Sarai your wife, do not call her Sarai, for her name is to be Sarah. ¹⁶ And I will bless her and will surely give you a son by her. I will bless her, and she will be the mother of nations; kings of peoples will descend from her.”
Do not miss that the renaming does not stop with Abraham. God turns to his wife as well, and old Sarai becomes Sarah, and with the new name comes a promise so specific it takes the breath away. This is no longer a general word about offspring someday. It is a son by her, from her own body, this barren woman of ninety who had long since folded away every hope of motherhood. And God will not let the promise be quiet or small. He says she will be the mother of nations, that kings of peoples will trace their line back to her. For decades she had been defined by the child she could not have. Now God speaks a future over her in which whole nations and their kings look back and call her mother. That is the kind of reversal only the Almighty can author, and it is worth pausing simply to thank Him that He delights to do it.
Genesis 17:17-22 (BSB)
¹⁷ Abraham fell facedown. Then he laughed and said to himself, “Can a child be born to a man who is a hundred years old? Can Sarah give birth at the age of ninety?” ¹⁸ And Abraham said to God, “O that Ishmael might live under Your blessing!” ¹⁹ But God replied, “Your wife Sarah will indeed bear you a son, and you are to name him Isaac. I will establish My covenant with him as an everlasting covenant for his descendants after him. ²⁰ As for Ishmael, I have heard you, and I will surely bless him; I will make him fruitful and multiply him greatly. He will become the father of twelve rulers, and I will make him into a great nation. ²¹ But I will establish My covenant with Isaac, whom Sarah will bear to you at this time next year.” ²² When He had finished speaking with Abraham, God went up from him.
Watch Abraham here, because he does two things at once that seem to pull against each other. He falls facedown, the posture of a man worshiping, and then he laughs, and to himself he does the arithmetic that any of us would do. A hundred years old, and Sarah ninety, and a baby? The numbers simply do not work, and he knows it. Then, as if to steady himself on something more reachable, he lifts up the son he already has: O that Ishmael might live under Your blessing. It is a very human prayer, a man trying to trade the impossible dream for the possible one right in front of him.
But God will not let him settle for less than what He promised. Your wife Sarah will indeed bear you a son, He says, and He even names him in advance: Isaac, a name that means he laughs, so that the laughter of doubt is turned, by God’s own hand, into the name of the child who answers it. And notice the tenderness in what God does for Ishmael. He does not brush the boy aside. I have heard you, He says, I will surely bless him and make him a great nation and the father of twelve rulers. Ishmael is truly loved and truly blessed. And yet the covenant, the special line that carries the promise of the whole world, God fixes firmly on the son Sarah will bear this time next year. God’s blessing is wide and generous, but His covenant runs exactly where He says it runs, on His terms and by His choosing, not ours.
Genesis 17:23-27 (BSB)
²³ On that very day Abraham took his son Ishmael and all those born in his household or purchased with his money—every male among the members of Abraham’s household—and he circumcised them, just as God had told him. ²⁴ So Abraham was ninety-nine years old when he was circumcised, ²⁵ and his son Ishmael was thirteen; ²⁶ Abraham and his son Ishmael were circumcised on the same day. ²⁷ And all the men of Abraham’s household—both servants born in his household and those purchased from foreigners—were circumcised with him.
And here is where the laughter turns into obedience, the same day. Not next week, not once he had thought it over, not after he had grown fully comfortable with a promise he had just called impossible in his own heart. On that very day, the text says, Abraham gathered every male in his household, from thirteen-year-old Ishmael to the newest servant bought from a foreigner, and he obeyed. He himself, at ninety-nine, submitted to the sign in his own aged body. There is something bracing about how plain it is. A man can wrestle with a promise, can even laugh at it, and still rise the same day and do what God has said.
Do not rush past who was included. Ishmael was circumcised, and every servant, born in the house or purchased from outside. Before Isaac was ever conceived, the sign of the covenant was already being pressed into a whole household that stretched beyond Abraham’s own bloodline. It is a small foretaste of the largeness of God’s purpose, the same purpose that back in chapter 12 aimed at all the families of the earth. Abraham could not yet see how far it would reach. He simply obeyed the God who could, and that obedience, offered the very day the word came, is the fitting close to the day God signed His name to the promise.
Study notes Going deeper
Hold on to the order of things in this chapter, because the New Testament comes back to it and builds a mountain of comfort on it. The covenant was given by grace and received by faith first, back in chapter 15, and only then, here in chapter 17, was it sealed with the sign of circumcision. That sequence is not a small detail. Centuries later the apostle Paul stood on it to explain how anyone, of any nation, is made right with God.
"And he received the sign of circumcision as a seal of the righteousness that he had by faith while he was still uncircumcised. So then, he is the father of all who believe but are not circumcised, in order that righteousness might be credited to them." Romans 4:11 (BSB)
Do you see what Paul finds here? Abraham was counted righteous by faith before he was circumcised, so the mark in the flesh was a seal on a righteousness already his, not the price he paid to get it. And that makes Abraham the father not merely of one nation but of everyone who believes, the whole multitude God named him for. The old man laughing in his tent could not have traced the line all the way to us, but God could. The covenant He signed that day was wide enough to reach every family who would ever come to Him the way Abraham did, with empty hands and simple trust. Thank God that He binds Himself to His people by grace, and then, faithful to His own name, keeps every word of it.