leviticus 14:10 And on the eighth day he shall take two he lambs without blemish, and one ewe lamb of the first year without blemish, and three tenth deals of fine flour for a meat offering, mingled with oil, and one log of oil. - Free Bible Online

      10-20. on the eighth day he shall take two he lambs without blemish, and one ewe-lamb of the first year without blemish--The purification of the leper was not completed till at the end of seven days, after the ceremonial of the birds [Le 14:4-7] and during which, though permitted to come into the camp, he had to tarry abroad out of his tent [Le 14:8], from which he came daily to appear at the door of the tabernacle with the offerings required. He was presented before the Lord by the priest that made him clean. And hence it has always been reckoned among pious people the first duty of a patient newly restored from a long and dangerous sickness to repair to the church to offer his thanksgiving, where his body and soul, in order to be an acceptable offering, must be presented by our great Priest, whose blood alone makes any clean. The offering was to consist of two lambs, the one was to be a sin offering, and an ephah of fine flour (two pints equals one-tenth), and one log (half pint) of oil (Le 2:1). One of the lambs was for a trespass offering, which was necessary from the inherent sin of his nature or from his defilement of the camp by his leprosy previous to his expulsion; and it is remarkable that the blood of the trespass offering was applied exactly in the same particular manner to the extremities of the restored leper, as that of the ram in the consecration of the priests [Le 8:23]. The parts sprinkled with this blood were then anointed with oil--a ceremony which is supposed to have borne this spiritual import: that while the blood was a token of forgiveness, the oil was an emblem of healing--as the blood of Christ justifies, the influence of the Spirit sanctifies. Of the other two lambs the one was to be a sin offering and the other a burnt offering, which had also the character of a thank offering for God's mercy in his restoration. And this was considered to make atonement "for him"; that is, it removed that ceremonial pollution which had excluded him from the enjoyment of religious ordinances, just as the atonement of Christ restores all who are cleansed through faith in His sacrifice to the privileges of the children of God.

JFB.