Complete Commentary on the Whole Bible, by Matthew Henry, at sacred-texts.com
(Lev 7:1-10) Concerning the trespass-offering.
(v. 11-27) Concerning the peace-offering.
(Lev 7:28-34) The wave and heave offerings.
(Lev 7:35-38) The conclusion of these institutions.
In the sin-offering and the trespass-offering, the sacrifice was divided between the altar and the priest; the offerer had no share, as he had in the peace-offerings. The former expressed repentance and sorrow for sin, therefore it was more proper to fast than feast; the peace-offerings denoted communion with a reconciled God in Christ, the joy and gratitude of a pardoned sinner, and the privileges of a true believer.
As to the peace-offerings, in the expression of their sense of mercy, God left them more at liberty, than in the expression of their sense of sin; that their sacrifices, being free-will offerings, might be the more acceptable, while, by obliging them to bring the sacrifices of atonement, God shows the necessity of the great Propitiation. The main reason why blood was forbidden of old, was because the Lord had appointed blood for an atonement. This use, being figurative, had its end in Christ, who by his death and blood-shedding caused the sacrifices to cease. Therefore this law is not now in force on believers.
The priest who offered, was to have the breast and the right shoulder. When the sacrifice was killed, the offerer himself must present God's part of it; that he might signify his cheerfully giving it up to God. He was with his own hands to lift it up, in token of his regard to God as the God of heaven; and then to wave it to and fro, in token of his regard to God as the Lord of the whole earth. Be persuaded and encouraged to feed and feast upon Christ, our Peace-offering. This blessed Peace-offering is not for the priests only, for saints of the highest rank and greatest eminence, but for the common people also. Take heed of delay. Many think to repent and return to God when they are dying and dropping into hell; but they should eat the peace-offering, and eat it now. Stay not till the day of the Lord's patience be run out, for eating the third day will not be accepted, nor will catching at Christ when thou art gone to hell!
Solemn acts of religious worship are not things which we may do or not do at our pleasure; it is at our peril if we omit them. An observance of the laws of Christ cannot be less necessary than of the laws of Moses.