TT #26 · Parshas Tazria · Aliyah 1 · Passuk 3
English: On the eighth day the flesh of his foreskin shall be circumcised.
Chabad.org — Chumash, English translation + Rashi for Vayikra 12:3
Torah Temimah cites Shabbos 132b.
E-Daf — Shabbos 132b · Shas.org · Steinsaltz Center — Shabbos 132b
English: The verse says, “He shall circumcise the flesh of his foreskin.” The word “flesh” teaches that circumcision is performed even when a tzaraas lesion is present on the foreskin.
Textual inclusion
The word “flesh” is the textual basis for allowing circumcision even when a baheres is present on the foreskin.