Leviticus 10:12-13

12Then Moses said to Aaron and his remaining sons, Eleazar and Ithamar, “Take what is left of the grain offering after a portion has been presented as a special gift to the Lord, and eat it beside the altar. Make sure it contains no yeast, for it is most holy.

13You must eat it in a sacred place, for it has been given to you and your descendants as your portion of the special gifts presented to the Lord. These are the commands I have been given.