Rashi on Leviticus 7:9/רש"י על ויקרא ז׳:ט׳

1לכהן המקריב אתה וגו'‏‎‎‏‎‎ [AND EVERY MEAL OFFERING …] SHALL BE THE PRIEST’S THAT OFFERETH IT etc. — One might think it shall be his exclusively! Scripture, however, states (v. 10) לכל בני אהרן תהיה IT SHALL BELONG TO ALL THE SONS OF AARON; — one might think then, that it shall belong to all of them, which is, however, impossible, for Scripture states “[it shall be] the priest’s (that offereth it”! How then can these apparently contradictory passages be reconciled? By referring the text to the “family”) officiating on that day on which it (the מנחה) is offered (Sifra, Tzav, Chapter 10 2).