And the father of circumcision to them who are not of the circumcision only, but who also walk in the steps of that faith of our father Abraham, which he had being yet uncircumcised.
All Commentaries on Romans 4:12 Go To Romans 4
Irenaeus of Lyons
AD 202
As Paul does also testify, saying that we are children of Abraham because of the similarity of our faith, and the promise of inheritance.