Exodus 29:34-36

New Revised Standard Version Catholic Edition

³⁴ If any of the flesh for the ordination, or of the bread, remains until the morning, then you shall burn the remainder with fire; it shall not be eaten, because it is holy.

³⁵ Thus you shall do to Aaron and to his sons, just as I have commanded you; through seven days you shall ordain them. ³⁶ Also every day you shall offer a bull as a sin offering for atonement. Also you shall offer a sin offering for the altar, when you make atonement for it, and shall anoint it, to consecrate it.