John Gill Commentary Leviticus 7

Likewise this [is] the law of the trespass [offering]
Or the various rites and rules to be observed at the offering of it: the persons for whom it was to be made are described in the two preceding chapters, (Leviticus 5:1–6:30) both such that sinned through ignorance, and knowingly, and here the place and parts of the offering, and how to be disposed of, are declared:

it [is] most holy ;
wholly devoted for sacred use, either to the Lord, or to his priests; there were some things the Jews call light holy things, and others most holy in the highest degree, of this sort was the trespass offering.

In the place where they kill the burnt offering shall they
kill the trespass [offering
See (Leviticus 1:11) :

and the blood thereof shall he sprinkle round about upon the altar ;
on the upper part of it. There was a scarlet thread that was drawn around the altar in the middle, the blood of some of the sacrifices was sprinkled below it; and some above it, as was the blood of the trespass offering.

And he shall offer of it all the fat thereof
To the Lord, that being claimed by him, as in the peace offerings of the herd, and of the flock, whether a bullock or cow, a lamb or a goat, (Leviticus 3:3) and in the sin offering of the bullock, (Leviticus 1:8) :

and the rump ,
or tail, which of sheep and rams, for the trespass offering, was very large and fat in those countries; (See Gill on Exodus 29:22) (See Gill on Leviticus 3:9):

and the fat that covereth the inwards ;
called the "omentum".

And the two kidneys, and the fat that is on them
Which are usually covered with fat:

which is by the flanks :
or rather that which is "upon" them ^F25 ; for this respects not the situation of the kidneys, nor the fat upon them, but the fat which is upon the flanks, as distinct from that, and where there are great collops of it, see (Job 15:27) :

and the caul that is above the liver ;
the lobe upon the liver, according to the Septuagint:

with the kidneys, he shall take away ;
all the fat before mentioned, together with the kidneys, were to be taken away from the ram of the trespass offering, and burnt, as follows.

FOOTNOTES:

• F25: (Mylokh le rva) "et qui est superiliis", Tigurine version.

And the priest shall burn them upon the altar
Fat taken off of the several parts before mentioned, and the kidneys: which were to be

[for] an offering made by fire unto the Lord ;
and was acceptable to him, being typical of the offering of Christ, which is a sweet smelling savour, bearing the fire of divine wrath in the room and stead of his people:

it [is] the trespass [offering] ;
an offering for a trespass committed, to make atonement for it; and this part of it, the burning of the fat, was properly the offering to the Lord, all the rest were the priest's, as follows.