They must eat those things by which atonement was made for their ordination and consecration. But no outsider may eat them, because these things are sacred.
Here is, I. The law concerning the consecration of Aaron and his sons to the priest's office, which was to be done with a great deal of ceremony and solemnity, that they themselves might be duly affected with the greatness of the work to which they were called, and that the people also might learn to magnify the office and none might dare to invade it. 1.
Commenting on Exodus 29:1-37
And they shall eat those things wherewith the atonement was made,.... For the sins of Aaron and his sons, for they were men of infirmity, and needed sacrifice for sin themselves; and herein Christ their antitype excelled them, that he had no sin of his own, and needed not to offer first for them, and then for the sins of others, as Aaron and his...
And they shall eat those things wherewith the atonement was made, to consecrate [and] to sanctify them: but a stranger shall not eat [thereof], because they [are] holy. (l) That is, by the sacrifices.