Genesis 21:2-4

Holman Christian Standard Bible

² Sarah became pregnant and bore a son to Abraham in his old age, at the appointed time God had told him.^{(A) 3} Abraham named his son who was born to him—the one Sarah bore to him—Isaac.^{(B) 4} When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.^(C)