John Gill Commentary Leviticus 8:32

"And that which remaineth of the flesh and of the bread shall ye burn with fire." — Leviticus 8:32 (ASV)

And that which remains of the flesh and of the bread ,
&c.] Until the next morning, which could not be eaten by Aaron and his sons:

shall you burn with fire ;
that it might not be corrupted, nor put to common nor superstitious uses.