Galatians 3:14

3:14 in order that in Christ Jesus the blessing of Abraham would come to the Gentiles, so that we could receive the promise of the Spirit by faith.

Galatians 3:18

3:18 For if the inheritance is based on the law, it is no longer based on the promise, but God graciously gave it to Abraham through the promise.

Galatians 4:22

4:22 For it is written that Abraham had two sons, one by the slave woman and the other by the free woman.