Leviticus 7:33

‎'וגו‎‎‎‎‎‎‎‏‎ השלמים ‎ ‏‏‎דם‎ ‎את ‎‎המקריב‎ [HE AMONG THE SONS OF AARON] THAT OFFERETH THE BLOOD OF THE PEACE-OFFERINGS [AND THE FAT SHALL HAVE THE SHOULDER OF THE RIGHT SIDE FOR HIS PART] — “He that offereth the blood” means: he who is fitted to perform the sprinkling of it and to burn the fat portions, — thus excluding a priest who was unclean at the time when the blood was sprinkled, or the fat portions were burnt — that he does not share in the flesh (Sifra, Tzav, Chapter 16 8; Zevachim 98b).

הַמַּקְרִ֞יב אֶת־דַּ֧ם הַשְּׁלָמִ֛ים וְאֶת־הַחֵ֖לֶב מִבְּנֵ֣י אַהֲרֹ֑ן ל֧וֹ תִהְיֶ֛ה שׁ֥וֹק הַיָּמִ֖ין לְמָנָֽה׃

He among the sons of Aharon, that offers the blood of the peace offering, and the fat, shall have the right shoulder for his part.