Romans 9:9
For this is a word of promise, "At the appointed time I will come, and Sarah will have a son."
Genesis 18:10
He said, "I will certainly return to you when the season comes round. Behold, Sarah your wife will have a son." Sarah heard in the tent door, which was behind him.
Genesis 18:14
Is anything too hard for Yahweh? At the set time I will return to you, when the season comes round, and Sarah will have a son."
Genesis 17:21
But my covenant I establish with Isaac, whom Sarah will bear to you at this set time next year."
Genesis 21:2
Sarah conceived, and bore Abraham a son in his old age, at the set time of which God had spoken to him.
Hebrews 11:11-12
By faith, even Sarah herself received power to conceive, and she bore a child when she was past age, since she counted him faithful who had promised.
Hebrews 11:17
By faith, Abraham, being tested, offered up Isaac. Yes, he who had gladly received the promises was offering up his one and only son;