Leviticus 21:22

מקדשי הקדשים OF THE MOST HOLY — These are what are technically known as קדשי קדשים — of them he may eat. ומן הקדשים יאכל AND OF THE HOLY HE MAY EAT — these are what are technically known as קדשים קלים. But if קדשי קדשים are mentioned as being permitted to him as food, why are קדשים קלים also mentioned? Could this not be inferred by a conclusion a fortiori? But the explanation is as follows: If קדשים קלים were not expressly mentioned as being permitted, I might have said: of the sacrifices holy in the highest degree the priest with a bodily blemish may eat — because we find that these had on one occasion been permitted to be eaten even by a non-priest, for Moses (who was not a priest) ate the flesh of the installation offering (cf. Leviticus 8:29; and this was holy in the highest degree since Scripture continues there: “Seethe the flesh at the entrance of the appointed tent… etc., a law that only applies to קדשי קדשים) — but he (a priest who is בעל מום) must not eat of the breast and the shoulder of sacrifices holy in a minor degree, since we do not find that a non-priest ever took a share in them. On this account sacrifices holy in a minor degree are expressly stated as permitted to be eaten. Thus it is explained in Treatise Zevachim 101b (cf. also Sifra, Emor, Chapter 3 8-9).

לֶ֣חֶם אֱלֹהָ֔יו מִקׇּדְשֵׁ֖י הַקֳּדָשִׁ֑ים וּמִן־הַקֳּדָשִׁ֖ים יֹאכֵֽל׃

He shall eat the bread of his God, both of the most holy, and of the holy.