Exodus 29:31-33

Young's Literal Translation

³¹ `And the ram of the consecration thou dost take, and hast boiled its flesh in the holy place;

³² and Aaron hath eaten -- his sons also -- the flesh of the ram, and the bread which [is] in the basket, at the opening of the tent of meeting;

³³ and they have eaten those things by which there is atonement to consecrate their hand, to sanctify them; and a stranger doth not eat -- for they [are] holy;