Isaac's Birth Promised

Genesis 17

¹⁵ God said to Abraham, "As for Sarai your wife, you shall not call her Sarai, but Sarah shall be her name. ¹⁶ I will bless her, and moreover I will give you a son by her. I will bless her, and she shall give rise to nations; kings of peoples shall come from her." ¹⁷ Then Abraham fell on his face and laughed, and said to himself, "Can a child be born to a man who is a hundred years old? Can Sarah, who is ninety years old, bear a child?" ¹⁸ And Abraham said to God, "O that Ishmael might live in your sight!" ¹⁹ God said, "No, but your wife Sarah shall bear you a son, and you shall name him Isaac. ₁ I will establish my covenant with him as an everlasting covenant for his offspring after him. ²⁰ As for Ishmael, I have heard you; I will bless him and make him fruitful and exceedingly numerous; he shall be the father of twelve princes, and I will make him a great nation. ²¹ But my covenant I will establish with Isaac, whom Sarah shall bear to you at this season next year."

²² And when he had finished talking with him, God went up from Abraham. ²³ Then Abraham took his son Ishmael and all the slaves born in his house or bought with his money, every male among the men of Abraham's house, and he circumcised the flesh of their foreskins that very day, as God had said to him. ²⁴ Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin. ²⁵ And his son Ishmael was thirteen years old when he was circumcised in the flesh of his foreskin. ²⁶ That very day Abraham and his son Ishmael were circumcised; ²⁷ and all the men of his house, slaves born in the house and those bought with money from a foreigner, were circumcised with him.

Genesis 18

¹ The Lord appeared to Abraham ₂ by the oaks ₃ of Mamre, as he sat at the entrance of his tent in the heat of the day. ² He looked up and saw three men standing near him. When he saw them, he ran from the tent entrance to meet them, and bowed down to the ground. ³ He said, "My lord, if I find favor with you, do not pass by your servant. ⁴ Let a little water be brought, and wash your feet, and rest yourselves under the tree. ⁵ Let me bring a little bread, that you may refresh yourselves, and after that you may pass on--since you have come to your servant." So they said, "Do as you have said." ⁶ And Abraham hastened into the tent to Sarah, and said, "Make ready quickly three measures ₄ of choice flour, knead it, and make cakes." ⁷ Abraham ran to the herd, and took a calf, tender and good, and gave it to the servant, who hastened to prepare it. ⁸ Then he took curds and milk and the calf that he had prepared, and set it before them; and he stood by them under the tree while they ate.

⁹ They said to him, "Where is your wife Sarah?" And he said, "There, in the tent." ¹⁰ Then one said, "I will surely return to you in due season, and your wife Sarah shall have a son." And Sarah was listening at the tent entrance behind him. ¹¹ Now Abraham and Sarah were old, advanced in age; it had ceased to be with Sarah after the manner of women. ¹² So Sarah laughed to herself, saying, "After I have grown old, and my husband is old, shall I have pleasure?" ¹³ The Lord said to Abraham, "Why did Sarah laugh, and say, "Shall I indeed bear a child, now that I am old?' ¹⁴ Is anything too wonderful for the Lord? At the set time I will return to you, in due season, and Sarah shall have a son." ¹⁵ But Sarah denied, saying, "I did not laugh"; for she was afraid. He said, "Oh yes, you did laugh."

¹⁶ Then the men set out from there, and they looked toward Sodom; and Abraham went with them to set them on their way. ¹⁷ The Lord said, "Shall I hide from Abraham what I am about to do, ¹⁸ seeing that Abraham shall become a great and mighty nation, and all the nations of the earth shall be blessed in him? ₅ ¹⁹ No, for I have chosen ₆ him, that he may charge his children and his household after him to keep the way of the Lord by doing righteousness and justice; so that the Lord may bring about for Abraham what he has promised him." ²⁰ Then the Lord said, "How great is the outcry against Sodom and Gomorrah and how very grave their sin! ²¹ I must go down and see whether they have done altogether according to the outcry that has come to me; and if not, I will know."