Commento su Levitico 21:21

כל איש אשר בו מום NO MAN THAT HATH A BLEMISH… [SHALL COME NEAR] — This is intended to include in the prohibition (besides the blemishes expressly mentioned in vv. 18—20) also other bodily blemishes (Sifra, Emor, Chapter 3 1).

כל איש…מזרע אהרון, "Any man of the descendants of Aaron..who has a blemish,etc." The reason the warning has been repeated is to alert the Israelites that they must not allow a priest who suffers from such a blemish to perform sacrificial service. The Torah phrased this warning in indirect speech to make clear it was not addressed to the priest directly.

To include other blemishes. Because if not so, why does it repeat “Any man who has a blemish” a second time? It is already written above (verse 17), “Anyone of your offspring, through [all] their generations who will have a blemish, etc.”

מום בו HE HATH A BLEMISH — These apparently redundant words imply: so long as he has the bodily blemish he is unfit for priestly service; (the translation is: מום בו while the blemish is in him, '‎לא יגש וכו‎ he shall not approach to offer); consequently, if his blemish disappears, he becomes again fit for it (Sifra, Emor, Chapter 3 6).

Every food. You might ask: Rashi already explained this above (verse 17)? Furthermore, here he [only] explains “every food,” while above he [also] explained “the food of his God?” The answer is: Above he is talking about the daily sacrifices that are called bread as it says, “My food [lit. bread] of My fires” (Bamidbar 28:2). But here he is talking about the most holy sacrifices, which one may have thought are not called bread. Therefore, he explains, “Every food is called bread.” [See Re’m]

לחם אלהיו THE BREAD OF HIS LORD — any food is called לחם (cf. Rashi on v. 17).