Parashas Vayikra · Aliyah 2 · Passuk 17
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim (verified pattern).
English: “And he shall split it” — “it,” a fit [offering] and not an unfit one; “it” by splitting, and not an animal olah by splitting.
R’ Eliezer #2 (מיעוט) — “it” limits the act to a valid bird olah.
Only a valid bird olah is split this way; an invalid offering is not, and animal olah is not split by this method.