Parashas Metzora · Passuk 14:11
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “Before Hashem” — he stations them at the Nikanor Gate, their backs to the east and their faces to the west.
Location requirement
Chazal specify the precise place and orientation: the metzora and his offerings are stood at the Nikanor Gate facing west (toward the Sanctuary).