¹⁸ Of whom it had been said, From Isaac will your seed take their name:

¹² But God said, Let it not be a grief to you because of the boy and Hagar his mother; give ear to whatever Sarah says to you, because it is from Isaac that your seed will take its name.

⁷ And they are not all children because they are the seed of Abraham; but, In Isaac will your seed be named.

¹⁹ 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.