That He prohibited a priest with a temporary blemish - such as scurvy or a scab or that which is similar to them - to serve [in the Temple] so long as he has the blemish. And that is His, may He be blessed, saying, "For any man who has a blemish shall not approach" (Leviticus 21:18). And the language of the Sifra (Sifra, Emor, Section 7:3) is, "'Anyone of your offspring, through [all] their generations who will have a blemish' (Leviticus 21:17) - I only [know about] a permanent blemish. From where [do we know the same for] a temporary blemish? [Hence] we learn to say, 'For any man who has a blemish shall not approach.'" And the regulations of permanent and temporary blessings have already been explained in the seventh [chapter] of Bekhorot. (See Parashat Emor; Mishneh Torah, Admission into the Sanctuary 6.)