Romans 9:9 For this is the word of promise, At this time will I come, and Sarah shall have a son.
10 And not only this; but when Rebecca also had conceived by one, even by our father Isaac;
11 (For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth
12 It was said unto her, The elder shall serve the younger.
13 As it is written, Jacob have I loved, but Esau have I hated.
14 What shall we say then? Is there unrighteousness with God? God forbid.
Seems God knew these two before their birth, why would you think an Omniscient God wouldn't know the choices everyone would make and therefore elected them to be the children of God based on what He knew about them beforehand.
We cross posted.....biblical foreknowledge is not about omniscience...
it is WHOM [the person].......not WHAT He did foreknow