Leviticus 6:17-20

6:17 It must not be baked with yeast. I have given it as their portion from my gifts. It is most holy, like the sin offering and the guilt offering. 6:18 Every male among the sons of Aaron may eat it. It is a perpetual allotted portion throughout your generations from the gifts of the Lord. Anyone who touches these gifts must be holy.’”

The Grain Offering of the Priests

6:19 Then the Lord spoke to Moses: 6:20 “This is the offering of Aaron and his sons which they must present to the Lord on the day when he is anointed: a tenth of an ephah of choice wheat flour as a continual grain offering, half of it in the morning and half of it in the evening.