Study Shabbat folio 137B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
If one circumcised but did not uncover the flesh at the area of the circumcision by folding back the thin membrane beneath the foreskin, it is as if he had not circumcised.
Talmud: R' Avina said that R' Yirmeya bar Abba said that Rav said: When the Mishnah said most of the corona, they meant the flesh that covers most of the height of the corona, as well as most of its circumference.
We learned in the Mishnah: If the baby was fleshy, the circumcisor corrects the circumcision so that it will not appear uncircumcised. Shmuel said: A child who is encumbered with flesh, one examines him, and as long as when his limb hardens he looks circumcised, one need not circumcise him again.
It was taught in a baraita that Rabban Shimon ben Gamliel says: A child who is encumbered with flesh, one examines him, and as long as when it hardens it does not appear circumcised, one needs to circumcise him again, and if not, one need not circumcise him again.
The Talmud asks: What is the practical difference between these two formulations? The Talmud answers: There is a practical difference between them in a case where he appears circumcised but does not appear fully circumcised. According to Shmuel, in order to avoid an additional circumcision, one must