Leviticus 10:11-15

and so as to teach the sons of Israel all the statutes which the Lord has spoken to them through Moses.”

Then Moses spoke to Aaron, and to his surviving sons, Eleazar and Ithamar, “Take the grain offering that is left over from the Lord’s offerings by fire and eat it as unleavened bread beside the altar, for it is most holy.

You shall eat it in a holy place, because it is your allotted portion and your sons’ allotted portion from the Lord’s offerings by fire; for so I have been commanded.

The breast of the wave offering, however, and the thigh of the offering you may eat in a clean place, you and your sons and your daughters with you; for they have been given as your allotted portion and your sons’ allotted portion from the sacrifices of the peace offerings of the sons of Israel.

They shall bring the thigh offered by lifting up and the breast offered by waving, along with the offerings by fire of the portions of fat, to present as a wave offering before the Lord; so it shall be a thing perpetually due you and your sons with you, just as the Lord has commanded.”