New King James Version (NKJV)
Genesis 20
13 And it came to pass, when God caused me to wander from my father’s house, that I said to her, ’This is your kindness that you should do for me: in every place, wherever we go, say of me, "He is my brother." ’ "
14 Then Abimelech took sheep, oxen, and male and female servants, and gave them to Abraham; and he restored Sarah his wife to him.
15 And Abimelech said, "See, my land is before you; dwell where it pleases you."
16 Then to Sarah he said, "Behold, I have given your brother a thousand pieces of silver; indeed this vindicates you before all who are with you and before everybody." Thus she was rebuked.
17 So Abraham prayed to God; and God healed Abimelech, his wife, and his female servants. Then they bore children;
18 for the Lord had closed up all the wombs of the house of Abimelech because of Sarah, Abraham’s wife.
Genesis 21
1 And the Lord visited Sarah as He had said, and the Lord did for Sarah as He had spoken.
2 For Sarah conceived and bore 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 who was born to him--whom Sarah bore to him--Isaac.
4 Then Abraham circumcised his son Isaac when he was eight days old, as God had commanded him.
5 Now Abraham was one hundred years old when his son Isaac was born to him.