Genesis 21:12

Galatians 4:23

23Now the son of the slave woman was conceived according to the flesh, but the son of the free woman was conceived through a promise.Gen 18:10, 14; 21:1-2; Rom 9:7-8; Heb 11:11

Hebrews 11:18

18about whom it had been said, “It is through Isaac that descendants will be named for you.”
Gen 21:12
Gen 21:12; Rom 9:7
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