The High Priest's Special Offering. The High Priest offers a meal offering every day, half in the morning, half at evening. The amount is the same as that of the smallest class of sin offerings (Leviticus 5:11). Priests do not consume their own sin offering; this sacrifice must therefore be burnt entire. The reference to the day of installation (Leviticus 6:20 a) must be a mistaken gloss (as is clear from perpetually, Leviticus 6:20 b).
Leviticus 6:18-23
18 All the males among the children of Aaron shall eat of it. It shall be a statute for ever in your generations concerning the offerings of the LORD made by fire: every one that toucheth them shall be holy.
19 And the LORD spake unto Moses, saying,
20 This is the offering of Aaron and of his sons, which they shall offer unto the LORD in the day when he is anointed; the tenth part of an ephah of fine flour for a meat offering perpetual, half of it in the morning, and half thereof at night.
21 In a pan it shall be made with oil; and when it is baken, thou shalt bring it in: and the baken pieces of the meat offering shalt thou offer for a sweet savour unto the LORD.
22 And the priest of his sons that is anointed in his stead shall offer it: it is a statute for ever unto the LORD; it shall be wholly burnt.
23 For every meat offering for the priest shall be wholly burnt: it shall not be eaten.