3:1-5 The peace-offerings had regard to God as the giver of all good things. These were divided between the altar, the priest, and the owner. They were called peace-offering, because in them God and his people did, as it were, feast together, in token of friendship. The peace-offerings were offered by way of supplication. If a man were in pursuit of any mercy, he would add a peace-offering to his prayer for it. Christ is our Peace, our Peace-offering; for through him alone it is that we can obtain an answer of peace to our prayers. Or, the peace-offering was offered by way of thanksgiving for some mercy received. We must offer to God the sacrifice of praise continually, by Christ our Peace; and then this shall please the Lord better than an ox or bullock.

3. he shall offer of the sacrifice of the peace offering—The peace offering differed from the oblations formerly mentioned in this respect: while the burnt offering was wholly consumed on the altar, and the freewill offering was partly consumed and partly assigned to the priests; in this offering the fat alone was burnt; only a small part was allotted to the priests while the rest was granted to the offerer and his friends, thus forming a sacred feast of which the Lord, His priests, and people conjointly partook, and which was symbolical of the spiritual feast, the sacred communion which, through Christ, the great peace offering, believers enjoy. (See further on Le 19:5-8; 22:21).

the fat that covereth the inwards—that is, the web work that presents itself first to the eye on opening the belly of a cow.

the fat … upon the inwards—adhering to the intestines, but easily removable from them; or, according to some, that which was next the ventricle.