Halakhah su Levitico 21:11

That a high priest not enter the tent of a dead body: That a high priest not enter the tent of a dead body - and even for one of the six commanded dead [relatives], as it is stated (Leviticus 21;11), "And for all dead souls, he shall not come" - meaning to say, he should not enter into the house with them. As the expression, "he shall not come" implies entering [entering a house].

That the high priest not become impure with any impurity: That the high priest not become impure - even with a dead body from among his relatives, and all the more so with all the other dead bodies in the world - with a type from the types of impurity, whether through touching or whether through carrying, as it is stated (Leviticus 21:11), "for his mother or for his father, he shall not become impure." [This is] meaning to say, even for these which are his relatives. And even though it forbade him from becoming impure for all souls at the beginning of the verse, that is impurity of coming into the tent of a dead body, as we explained there (Sefer HaChinukh 270). As behold, there it is written, "he shall not come," which implies coming into a tent. Whereas here all of the other types of impurity are forbidden more generally. And do not think that that which it stated, "for his father and for his mother, etc.," is an explanation of the beginning of the verse that stated, "And for all dead souls, etc." - as the matter is not like this. But [rather,] they are two [distinct] negative commandments, "he shall not come," and "he shall not become impure." And the language of Sifra, Emor, Section 2:4 is "He is liable for 'he shall not come,' and he is liable for 'he shall not become impure.'" And they, may their memory be blessed likewise said, that a common priest is liable for "he shall not come," and "he shall not become impure" - even though it is not written about him - stemming from the law of an inferential comparison; as both of them were forbidden from becoming impure with a soul, and as it appears in the Gemara. However we should not count "he shall not come" and "he shall not become impure" for a common priest as two negative commandments, such as we counted them for a high priest. [This is] as they are written explicitly with a high priest; while with a common priest, one is learned from an inferential comparison. And the elder has already instructed - that is Rambam, may his memory be blessed - that we should only count those that are explicit in Scriputre in the tally of the six hundred and thirteen commandments, but not those that are learned through the hermeneutic principles through which the Torah is expounded.