19 Then the priest shall offer the sin offering, and make atonement for him who is to be cleansed from his uncleanness. Afterward he shall kill the burnt offering. 20 And the priest shall offer the burnt offering and the grain offering on the altar. So the priest shall make atonement for him, and he shall be clean.
21 "But if he is poor and cannot afford it, then he shall take one male lamb as a trespass offering to be waved, to make atonement for him, one-tenth of an ephah of fine flour mixed with oil as a grain offering, a log of oil, 22 and two turtledoves or two young pigeons, such as he is able to afford: one shall be a sin offering and the other a burnt offering.
Matthew Henry's Commentary on Leviticus 14:19-22
Commentary on Leviticus 14:10-32
(Read Leviticus 14:10-32)
The cleansed leper was to be presented to the Lord, with his offerings. When God has restored us to enjoy public worship again, after sickness, distance, or otherwise, we should testify our thanksgiving by our diligent use of the liberty. And both we and our offerings must be presented before the Lord, by the Priest that made us clean, even our Lord Jesus. Beside the usual rites of the trespass-offering, some of the blood, and some of the oil, was to be put upon him that was to be cleansed. Wherever the blood of Christ is applied for justification, the oil of the Spirit is applied for sanctification; these two cannot be separated. We have here the gracious provision the law made for poor lepers. The poor are as welcome to God's altar as the rich. But though a meaner sacrifice was accepted from the poor, yet the same ceremony was used for the rich; their souls are as precious, and Christ and his gospel are the same to both. Even for the poor one lamb was necessary. No sinner could be saved, had it not been for the Lamb that was slain, and hath redeemed us to God with his blood.