He gave him the covenant of circumcision. So Avraham became the father of Yitzchak, and circumcised him the eighth day. Yitzchak became the father of Ya`akov, and Ya`akov became the father of the twelve patriarchs.
Now I say this. A covenant confirmed beforehand by God in Messiah, the law, which came four hundred thirty years after, does not annul, so as to make the promise of no effect.