Exodus 29:33-35

Young's Literal Translation

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;

³⁴ and if there be left of the flesh of the consecration or of the bread till the morning, then thou hast burned that which is left with fire; it is not eaten, for it [is] holy.

³⁵ `And thou hast done thus to Aaron and to his sons, according to all that I have commanded thee; seven days thou dost consecrate their hand;