Thirteen years of silence follow Ishmael's birth, and then God speaks, and the first thing he gives is his name. 1"I am God Almighty; walk before me, and be blameless." The command comes second. Everything asked of Abram rests on who is asking, and the title fits the moment, because God names himself Almighty just before he asks a man of ninety-nine and a woman of ninety to believe in a son.
The chapter hands out its gifts in an odd order. A new name comes first. Abram, "exalted father," becomes Abraham, 5"the father of a multitude of nations," and every time someone spoke his name the promise was spoken over him again, whether he felt like believing it that day or not. Sarai becomes Sarah, and God adds 16"she shall become nations; kings of peoples shall come from her." Then the sign arrives: 11"it shall be a sign of the covenant between me and you." The sign follows the faith, because Genesis 15 had already counted Abram's belief to him as righteousness, years before any knife. Paul points to exactly this sequence (Romans 4:11). The cut seals what trust had already received.
Then Abraham laughs. He falls on his face, which is worship, and laughs at the same moment, which is honesty. 17"Shall a child be born to a man who is a hundred years old?" His next sentence shows where his hope had settled: 18"Oh that Ishmael might live before you!" After thirteen years of watching a healthy boy grow up in his tent, Ishmael looked like the safe and reasonable answer to the promise. Abraham asks God to accept the plan the two of them had built while waiting.
God's answer is direct and kind. 19"No, but Sarah your wife shall bear you a son, and you shall call his name Isaac." The name means "he laughs." God takes the laughter of doubt and writes it into the child's name, so that every future roll call of the family would echo the moment. He also hears the prayer beneath the prayer: 20"As for Ishmael, I have heard you; behold, I have blessed him." The covenant runs through the son God named, at the time God chose.
The chapter closes with obedience in one line: 26"That very day Abraham and his son Ishmael were circumcised." Abraham himself was ninety-nine when he submitted to the knife (17:24). Thirteen years of scheming end with a man who does what he is told the day he is told it.
Most of us keep an Ishmael. It is the plan we built while God seemed slow, the arrangement that works well enough that giving it up feels reckless. This chapter shows God naming himself Almighty first, then asking for trust, then folding the doubter's laughter into the promise until the child arrives. The Almighty asks nothing of you that his own power has not already covered.
Prayer
Father, you met Abraham in the old age of his body and asked for a trust he could not produce alone. We keep our own Ishmaels, the safer plans built while we waited on you. Teach us to hear your name before we hear your commands, and to remember that you supply what you ask. Thank you for the covenant sealed in Christ. Keep us walking before you, blameless because you are Almighty. In Jesus' name, amen.