Leviticus 10:12; Leviticus 10:13

12 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 unleavened beside the altar, for it is most holy.

13 "You shall eat it, moreover, in a holy place, because it is your due and your sons' due out of the LORD'S offerings by fire; for thus I have been commanded.