Genesis 18:10
10 The Lord said, “I will surely return to you uabout this time next year, and vSarah your wife shall have a son.” And Sarah was listening at the tent door behind him.
Genesis 18:14
14 aIs anything too hard1 for the Lord? bAt the appointed time I will return to you, about this time next year, and Sarah shall have a son.”
Genesis 17:21
21 But lI will establish my covenant with Isaac, mwhom Sarah shall bear to you at this time next year.”