“And the uncircumcised male who shall not circumcise the flesh of his foreskin, that soul shall be excised from his people; he has breached My covenant” (Genesis 17:14). “And the uncircumcised male” – Rabbi Ḥagai said: Is there such a thing as an uncircumcised female? The meaning is, rather, [to teach] that one is circumcised at the place on the body where it is recognizable whether he is male or female.
“He has breached My covenant” – this refers to one whose foreskin was drawn out.51After circumcision, the skin was drawn out, creating the impression that he is uncircumcised. It is taught: One whose foreskin is drawn out need not be circumcised. Rabbi Yehuda said: He should not be circumcised, because it is like a compressed foreskin.52Cutting off this flesh would cause injury to the person, rendering him infertile.
They said before Rabbi Yehuda: But is it not so that there were many people in the days of ben Koziva,53Also known as Bar Kokhva. They were forced by the Roman oppressors to draw out their flesh to appear uncircumcised. and all of them had children even though they were re-circumcised?54So it is clear that there is no danger of infertility from a repeat circumcision. That is what is written: “Himol yimol” – even four or five times. “He has breached My covenant” – this refers to one whose foreskin was drawn out.55And did not re-circumcise himself.