Leviticus 10:12-13

And Moses speaketh unto Aaron, and unto Eleazar, and unto Ithamar his sons, who are left, `Take ye the present that is left from the fire-offerings of Jehovah, and eat it unleavened near the altar, for it is most holy,

and ye have eaten it in the holy place, for it is thy portion, and the portion of thy sons, from the fire-offerings of Jehovah; for so I have been commanded.