Leviticus 7:15-17

15The meat of their fellowship offering of thanksgiving must be eaten on the day it is offered; they must leave none of it till morning. 16“ ‘If, however, their offering is the result of a vow or is a freewill offering, the sacrifice shall be eaten on the day they offer it, but anything left over may be eaten on the next day. 17Any meat of the sacrifice left over till the third day must be burned up.