Genesis 20:18-21:2

WEB(i) 18 For Yahweh had closed up tight all the wombs of the house of Abimelech, because of Sarah, Abraham’s wife. 21 1 Yahweh visited Sarah as he had said, and Yahweh did to Sarah as he had spoken. 2 Sarah conceived, and bore Abraham a son in his old age, at the set time of which God had spoken to him.