Genesis 17:19

19God said, “No, but aSarah your wife shall bear you a son, and you shall call his name bIsaac.
 Isaac means he laughs
I will establish my covenant with him as an everlasting covenant for his offspring after him.

Psalms 132:11

11 dThe Lord swore to David a sure oath
efrom which he will not turn back:
f“One of the sons of your body
Hebrew  of your fruit of the womb

I will set on your throne.
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