Charles Ellicott Commentary Leviticus 5:13

"And the priest shall make atonement for him as touching his sin that he hath sinned in any of these things, and he shall be forgiven: and [the remnant] shall be the priest`s, as the meal-offering." — Leviticus 5:13 (ASV)

Concerning his sin that he had sinned in one of these. —That is, in one of the three sins specified in Leviticus 5:1-4 of this chapter. (See Leviticus 5:5.)

And the remnant shall be the priest’s. —Better, and it shall belong to the priest. The word remnant is not in the original, and is better left out, since with the exception of the handful which he took out to burn upon the altar, the whole tenth part of the ephah of fine flour belonged to the priest. At the time of Christ, this only took place when the offerer was a layman. But when a priest committed the offence and brought the offering in question, the whole tenth part of the ephah of flour was burnt on the altar, as was done in the case of the meat offering.