Genesis 17:13-19

English Standard Version

¹³ both he who is born in your house and he who is bought with your money, shall surely be circumcised. So shall my covenant be in your flesh an everlasting covenant. ¹⁴ Any uncircumcised male who is not circumcised in the flesh of his foreskin shall be cut off from his people; he has broken my covenant.”

Isaac's Birth Promised

¹⁵ And God said to Abraham, “As for Sarai your wife, you shall not call her name Sarai, but Sarah^[a] shall be her name. ¹⁶ I will bless her, and moreover, I will ^(A)give^[b] you a son by her. I will bless her, and ^(B)she shall become nations; kings of peoples shall come from her.” ¹⁷ Then Abraham ^(C)fell on his face ^(D)and laughed and said to himself, “Shall a child be born to a man who is a hundred years old? Shall Sarah, who is ninety years old, bear a child?” ¹⁸ And Abraham said to God, “Oh that Ishmael might live before you!” ¹⁹ God said, “No, but ^(E)Sarah your wife shall bear you a son, and you shall call his name ^(F)Isaac.^[c] I will establish my covenant with him as an everlasting covenant for his offspring after him.