Leviticus 7:17,18

The flesh on the third day shall be burned with fire Lest it should putrefy, and so be exposed to contempt, and to prevent their distrust of God's providence, or indulging a covetous disposition, by reserving for domestic use what ought to be given to their friends or the poor. If eaten at all on the third day, it shall not be accepted In this case, not only the sacrifice became worthless, but the offerer guilty of a new offence. Neither shall it be imputed unto him For an acceptable service to God, but reckoned as if it had not been offered at all.

Whatsoever is not of faith is sin; and that cannot be of faith which has not the sanction of God's authority, expressed or implied, and is not done agreeably to his will. It is therefore not acceptable to him.