Adam Clarke on Leviticus 6:26

The priest - shall eat it - From the expostulation of Moses with Aaron, Lev 10:17, we learn that the priest, by eating the sin-offering of the people, was considered as bearing their sin, and typically removing it from them: and besides, this was a part of their maintenance, or what the Scripture calls their inheritance; see Eze 44:27-30. This was afterwards greatly abused; for improper persons endeavored to get into the priest's office merely that they might get a secular provision, which is a horrible profanity in the sight of God. See 1Sam 2:36; Jer 23:12; Eze 34:2-4; and Hos 4:8.