What is this Pasuk coming to teach us?
Rashi (citing Toras Kohanim): It is coming to teach us that someone who eats a Nivlas Of Tahor becomes Tamei, and is forbidden to eat Kodshim (or to enter the Beis-Hamikdash). 1
Ramban, Moshav Zekenim: It is a warning against eating Neveilos (animals that died without Shechitah) and T'reifos 2 (they were mortally injured), e.g. via a lion or a bear. He will become Tamei (through moving or touches them) and forbidden to Kodshim until the night after he immerses.
Rashbam: It teaches us that a Kohen is forbidden to eat Nivlas Of Tamei. 3
Having already taught us this Halachah (11:39), why does the Torah repeat it here?
Rashbam: Bearing in mind that the Torah is speaking here to the Kohanim, it teaches them That, even though they are permitted to eat a Chatas ha'Of, on which Melikah was performed (it is technically a Neveilah), they are not permitted to eat [any other] Nivlas Of Tahor. 1
Why does the Torah add the word "bah"?