The part which Aaron and his sons were to eat of the sacrifice, implied the interest the people had in it. Revelation 3:20.
Related Commentaries of Exodus 29:28
Exodus 29:28-32
28 And it shall be Aaron's and his sons' by a statute for ever from the children of Israel: for it is an heave offering: and it shall be an heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering unto the LORD.
29 And the holy garments of Aaron shall be his sons' after him, to be anointed therein, and to be consecrated in them.
30 And that sond that is priest in his stead shall put them on seven days, when he cometh into the tabernacle of the congregation to minister in the holy place.
31 And thou shalt take the ram of the consecration, and seethe his flesh in the holy place.
32 And Aaron and his sons shall eat the flesh of the ram, and the bread that is in the basket, by the door of the tabernacle of the congregation.