Genesis 21:2

For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken
to him.

(Geneva Bible) - For (*) Sarah conceived, and bare Abraham a son in his (a) old age, at the same
season that God told him.
(*) Matthew 1:2; Acts 7:8; Galatians 4:23; Hebrews 11:11 .