Leviticus 2:2-3

2:2 Then he must bring it to the sons of Aaron, the priests, and the priest must scoop out from there a handful of its choice wheat flour and some of its olive oil in addition to all of its frankincense, and the priest must offer its memorial portion up in smoke on the altar – it is a gift of a soothing aroma to the Lord. 2:3 The remainder of the grain offering belongs to Aaron and to his sons – it is most holy from the gifts of the Lord.

Leviticus 10:12-13

Perpetual Statutes Moses spoke to Aaron

10:12 Then Moses spoke to Aaron and to Eleazar and Ithamar, his remaining sons, “Take the grain offering which remains from the gifts of the Lord and eat it unleavened beside the altar, for it is most holy. 10:13 You must eat it in a holy place because it is your allotted portion and the allotted portion of your sons from the gifts of the Lord, for this is what I have been commanded.