Leviticus 8:32

And that which remaineth of the flesh and of the bread shall ye burn with fire.

Cross-reference

Leviticus 7:17 gives a similar rule for peace offerings: leftover sacred meat must be burned, reinforcing the principle of holiness.

Exodus 29:34 gives the identical command for the ordination offering — this verse carries out that earlier instruction.

Exodus 12:10 commands burning leftover Passover lamb, echoing the same instruction for consecrated meat here.