KJV(i)
17 So Abraham prayed unto God: and God healed Abimelech, and his wife, and his maidservants; and they bare children.
18 For the LORD had fast closed up all the wombs of the house of Abimelech, because of Sarah Abraham's wife.
21 1 And the LORD visited Sarah as he had said, and the LORD did unto Sarah as he had spoken.
2 For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.
3 And Abraham called the name of his son that was born unto him, whom Sarah bare to him, Isaac.