Romans 4:11

Not in circumcision, but in uncircumcision! And he received the ot (sign or distinguishing mark) of the milah (circumcision) as a chotam (seal) of the Tzidkat HaEmunah (the Righteousness of Faith) which he had in his uncircumcision, in order that he might be father of all who believe through uncircumcision, that to be YITZDAK IM HASHEM might be reckoned, counted to them as well