And he received the sign of circumcision, a seal of the righteousness of the faith which he had yet being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed unto them also:
All Commentaries on Romans 4:11 Go To Romans 4
Tertullian of Carthage
AD 220
Nor yet did he observe the Sabbath. For he had "accepted".
Since, also, he deserved for that reason to be called "the father of many nations "whilst we, who are even more like him.
Which (injuriousness and violence) even the father of the faith.
(nations) who, as the fruit of the "faith "which precedes digamy, had to be accounted "sons of Abraham."