Genesis 16:2

2And Sarai said to Abram, “Behold now, the Lord has prevented me from bearing children. Go in to my servant; it may be that I shall obtain children
Hebrew be built up, which sounds like the Hebrew for  children
by her.” And Abram listened to the voice of Sarai.

Genesis 25:21

21And Isaac prayed to the Lord for his wife, because she was barren. And bthe Lord granted his prayer, and Rebekah his wife conceived.
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