See Leviticus 4:3. Aaron's sons here spoken of (as in Leviticus 6:22) must be the succession of high priests who succeeded him. The day of this offering was probably the eighth day of the ceremony of consecration Leviticus 8:35; Leviticus 9:1, when the high priest appears to have entered upon the duties of his office.

A meat offering perpetual - Jewish tradition is in favor of these words implying that this מנחה mı̂nchāh was offered by the high priest as a daily rite from the time of his consecration.

In the day when he is anointed - Not only in that day, but from that day forward, for this was to them and their successors a statute for ever. See Leviticus 6:22.

This is the offering of Aaron and his sons,.... That is, of such of them as succeeded him in the high priesthood, as appears from Leviticus 6:22 so Aben Ezra, of him, or of one of his sons in his room; though some think the common priests offered the following oblation at the time of their initiation into their office, though they were not anointed as the high priest was, nor obliged as he to continue the offering daily:

which they shall offer unto the Lord in the day when he is anointed; when he, or any of his sons in his stead, were anointed, for as yet he himself was not; see Leviticus 8:2 some, as Aben Ezra observes, think that "in", is instead of "from", and that the sense is, that Aaron, or his successor, and every of them, were to offer the following offering perpetually from the time of their being anointed, and put into the office of the high priest, and which certainly was the case, as appears by what follows:

the tenth part of an ephah of fine flour for a meat offering perpetual; which was an omer, and as much as a man could eat in one day; and this the high priest offered every day, as long as he lived, or was in his office, and that at his own expense, as Josephus says (p), not altogether, but in the following manner:

half of it in the morning, and half of it at night; so that this constantly returned as the morning and evening sacrifices did, and followed them. Jarchi says of this, that it was the common meat offering at the consecration of a priest, but the high priest offered it every day; and it appears from the Misnic writers (q) that this meat offering consisted of twelve cakes, the same number as those of the shewbread; the same phrase, a "perpetual statute", being used of one as the other; and six of these were offered in the morning, and six at evening; and this as the daily sacrifice had the same mystical meaning, and respected the continual efficacy of the sacrifice of Christ.

(p) Antiqu. l. 3. c. 10. sect. 7. (q) Misn. Menachot, c. 6. sect. 5. & Maimon. & Bartenora in ib.

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 {h} perpetual, half of it in the morning, and half thereof at night.

(h) So oft as the high priest shall be elected and anointed.

6:20 When he is anointed - For high - priest for he only of all the priests was to be anointed in future ages. This law of his consecration was delivered before, and is here repeated because of some additions made to it. Perpetual - Whensoever any of them shall be so anointed. At night - Or, in the evening; the one to be annexed to the morning - sacrifice, the other to the evening - sacrifice, over and besides that meal - offering which every day was to be added to the daily morning and evening sacrifices.

20. This is the offering of Aaron, and of his sons-the daily meat offering of the high priest; for though his sons are mentioned along with him, it was probably only those of his descendants who succeeded him in that high office that are meant. It was to be offered, one half of it in the morning and the other half in the evening-being daily laid by the ministering priest on the altar of burnt offering, where, being dedicated to God, it was wholly consumed. This was designed to keep him and the other attendant priests in constant remembrance, that though they were typically expiating the sins of the people, their own persons and services could meet with acceptance only through faith, which required to be daily nourished and strengthened from above.

6:14-23 The law of the burnt-offerings put upon the priests a great deal of care and work; the flesh was wholly burnt, and the priests had nothing but the skin. But most of the meat-offering was their own. It is God's will that his ministers should be provided with what is needful.