TT #15 · 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 135a.
E-Daf — Shabbos 135a · Shas.org
English: A child whose mother has the impurity of childbirth is circumcised on the eighth day; one whose mother does not have that impurity is not circumcised on the eighth day, as it says, “she shall be impure seven days, and on the eighth day he shall be circumcised.”
Juxtaposition
The juxtaposition of the mother's childbirth impurity and the eighth-day circumcision identifies when the eighth-day rule applies.