^{19 Ref} And God said, Not so; but Sarah, your wife, will have a son, and you will give him the name Isaac, and I will make my agreement with him for ever and with his seed after him.

^{20 Ref} As for Ishmael, I have given ear to your prayer: truly I have given him my blessing and I will make him fertile and give him great increase; he will be the father of twelve chiefs, and I will make him a great nation.

^{21 Ref} But my agreement will be with Isaac, to whom Sarah will give birth a year from this time.