This trespass-offering, with its blood and the oil, must be regarded as the main feature in the ceremony: no alteration being permitted even in the case of the poor Leviticus 14:21-23. There appears to be no other case in which an entire victim was waved (see Leviticus 7:30) before Yahweh. The Levites are spoken of as "a wave offering," Numbers 8:11-15 (see the margin). The man in this case, represented by his trespass-offering, was dedicated as a Wave-offering in like manner.

Wave-offering - See Exodus 29:27, and Leviticus 7, where the reader will find an ample account of all the various offerings and sacrifices used among the Jews.

And the priest shall take one he lamb,.... One of the he lambs brought by the leper for his offering:

and offer him for a trespass offering; for though the leprosy itself was a disorder or disease, and not sinful, yet the cause of it was sin, a trespass against God, and therefore a trespass offering must be offered: which was typical of Christ, whose soul was made a trespass offering, Isaiah 53:10; where the same word is used as here:

and the log of oil; See Gill on Leviticus 14:10,

and wave them for a wave offering before the Lord; heaving of them up and down, moving of them to and fro towards the several parts of the world, east, west, north, and south, even both the log of oil, and the he lamb for the trespass offering, and that alive, as Jarchi observes, and so says Maimonides (o).

(o) Hilchot Mechosre Capharah, c. 4. sect. 2.

And the priest shall take one he lamb, and offer him for a trespass offering, and the log of oil, and wave them for a wave offering before the LORD:

14:12 A trespass - offering - To teach them, that sin was the cause of leprosy, and of all diseases, and that these ceremonial observations had a farther meaning, to make them sensible of their spiritual diseases, that they might fly to God in Christ for the cure of them.

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.