הלכה על כלים 1:9

From the laws of the commandment is that which they said in a bereita in Keritot 6a that the composition of the incense was eleven spices, four of which are explicit in the Torah and seven of which are a tradition. And that which they said (Yoma 26a; Mishnah Tamid 7:3) that the incense is made either by the high priest or by a regular priest. And [that] which they said (Menachot 49a) that if he did not burn it in the morning, he burns the whole amount of the day - which is the weight of a hundred dinar - in the afternoon. And the weight of a dinar is well known. And [that] every day he would burn half of it in the morning and half of it in the evening, after the afternoon sacrifice before the arrangement of all of the lights, after the [lighting] of five of their wicks - as they were not lit consecutively (Yoma 14b). And [that] they would do this matter [as follows], the priest that merited to burn the incense takes a vessel - the name of which is a teni - heaped full of incense (Mishnah Tamid 6:3), and all of the people leave from between the sanctuary and between the chamber and the altar, as it states (Leviticus 16:17), "And no man will be in the tent of meeting, etc." And he [then] burns [it] in the way that is explained there in the Gemara (Mishnah Tamid 6:3) - that he gently throws the incense upon the coals in the gold pan, and he bows down and exits. And the rest of its details, how it is done, and that which they said during the grinding of the spices, "Crush well, well" - because our Rabbis, may their memory be blessed, said (Keritot 6a) that the voice is good for spices while they grind them - is all in Keritot and in Tamid (see Mishneh Torah, Laws of Daily Offerings and Additional Offerings 3).

From the laws of the commandment is that which they, may their memory be blessed, said (Mishnah Kelim 1:9) that the high priest only enter the Holy of Holies on Yom Kippur, when he enters four times and not more. As if he enters a fifth, he is liable for death by the hands of the Heavens. And a common priest may enter the chamber for the service every day. But anyone who enters the chamber not for the sake of the service - whether a high priest or a common priest, such as one who enters even to bow down - is lashed, but he is not liable for death. As it is stated 'Before the ark cover [...], that he not die' - for the Holy of Holies, he is liable for death; for the other parts of the sanctuary, (he is only in transgression of) a negative commandment. This is the opinion of Rambam, may his memory be blessed, about this negative commandment (Mishneh Torah, Laws of Admission into the Sanctuary 2:4). And I have already written the opinion of Ramban, may his memory be blessed, above (Sefer HaChinukh 149, 150), who said that entrance to the sanctuary, not for service, with wild [hair] and torn clothes is a rabbinic embellishment. And if so, according to his opinion, it is possible that anyone who entered to bow down is not [punished] with lashes at all; and this prohibition of "he shall not come" would only be in a completely empty coming - as such would be a disparagement to the honor of the [Temple], to enter into it for nothing. And the rest of its details are elucidated in Menachot and Sifra (see Mishneh Torah, Admission into the Sanctuary 2).