And when a stranger shall sojourn with thee, and will keep the passover to Jehovah, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land: but no uncircumcised person shall eat thereof.
Circumcise therefore the foreskin of your heart, and be no more stiffnecked.
And he gave him the covenant of circumcision: and so (Abraham) begat Isaac, and circumcised him the eighth day; and Isaac (begat) Jacob, and Jacob the twelve patriarchs.
and he received the sign of circumcision, a seal of the righteousness of the faith which he had while he was in uncircumcision; that he might be the father of all them that believe, though they be in uncircumcision, that righteousness might be reckoned unto them;