16 But if the sacrifice of his offering be a vow, or a voluntary offering, it shall be eaten the same day that he offereth his sacrifice: and on the morrow also the remainder of it shall be eaten:

17 But the remainder of the flesh of the sacrifice on the third day shall be burnt with fire.

18 And if any of the flesh of the sacrifice of his peace offerings be eaten at all on the third day, it shall not be accepted, neither shall it be imputed unto him that offereth it: it shall be an abomination, and the soul that eateth of it shall bear his iniquity.

Yesterday’s verses emphasized the necessity of the priest needing to eat his portion of sacrifices on the same day that the offering was made, but as we see today, there were special exceptions to that rule. If the offering was part of a vow, for example, it could be eaten on the same day, and an on the following day, but not any later than that.

Perhaps this is because a vow is forward-looking, whereas most other offering are looking backward. It specifies an action that you will do, not atonement for something you have already done. And that forward-looking element is represented in the priest being able to eat some of the food “tomorrow.” But this couldn’t be drawn out for too long, the ritual still needed to be coupled to the actual moment of the sacrifice, and so anything remaining on the third day had to be burned.

Respect for the ritual was very important, so much so that verse 18 warns that eating anything on the third day or after would not only be of no value to the offeror, but would be abominable and qualify as iniquity! We cannot have more good than what God gives to us, for then it ceases to be good.