Leviticus 5:12

“Then shall he bring it to the priest, etc.] The flour just as it was, not kneaded and made into a cake, as appears by what follows: and the priest shall take his handful of it; as much of the flour as he could hold in one hand: [even] a memorial thereof; to bring to mind his sin, and the goodness of God in admitting of an offering for it, and forgiving it upon that: and burn [it] on the altar, according to the offerings made by fire unto the Lord; in the same manner as other burnt offerings were made: it [is] a sin [offering]; or an expiatory sacrifice for sin.”

“Special occasions are mentioned on which sin-offerings are to be made with a particular confession of the offence for which atonement is sought Leviticus 5:5. Leviticus 5:1 Swearing - Adjuration. The case appears to be that of one who has been put upon his oath as a witness by a magistrate, and fails to utter all he has seen and heard (compare the marginal references. and Proverbs 29:24; Numbers 5:21). Leviticus 5:2-3 Hid from him - Either through forgetfulness or indifference, so that purification had been neglected. In such a case there had been a guilty negligence, and a sin-offering was required. On the essential connection between impurity and the sin-offering, see Leviticus 12:1.…”

“a memorial: Lev 2:2, Lev 2:9, Lev 2:16, Lev 6:15; Num 5:26; Act 10:4; Eph 5:2 according: Lev 1:9, Lev 1:13, Lev 1:17, Lev 2:9, Lev 3:4, Lev 3:11, Lev 4:35 Leviticus 5:13”