Genesis 20:17-21:2

English Standard Version

¹⁷ Then ^(A)Abraham prayed to God, and God healed Abimelech, and also healed his wife and female slaves so that they bore children. ¹⁸ For the Lord ^(B)had closed all the wombs of the house of Abimelech because of Sarah, Abraham's wife.

The Birth of Isaac

21 The Lord ^(C)visited Sarah as he had said, and the Lord did to Sarah ^(D)as he had promised. ² And Sarah ^(E)conceived and bore Abraham a son in his old age ^(F)at the time of which God had spoken to him.