(23) Ye shall eat no manner of fat.--That is, the fat of beeves, sheep, or goats. The fat of these three kinds of sacrificial quadrupeds is prohibited, even when they are not killed as sacrifices, but when slaughtered for private consumption; but the fat of other tame or wild clean quadrupeds, as stags, roes, &c. &c, was lawful. According to the practice which obtained during the second Temple, there are three kinds of fat for the eating of which a man incurred the penalty of excision: the fat (1) which is upon the inwards, (2) upon the two kidneys, and (3) upon the flanks (Leviticus 9:10). The rump, the kidney, and the caul above the liver were not called fat, except in sacrifices. The fat which is covered with flesh is lawful, the fat upon the kidneys is forbidden; but that which is within the kidneys, as well as that of the heart, is lawful.

7:11-27 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.Speak unto the children of Israel, saying,.... Putting them in mind, by repeating to them the laws concerning fat and blood, Leviticus 3:17.

ye shall eat no manner of fat; of any creature fit for food, whose flesh otherwise may be eaten, and particularly

of ox, or of sheep, or of goats: creatures used in sacrifice; though this is not to be restrained to such of them, and the fat of them that were sacrificed, whose fat was claimed by the Lord as his, and was burnt on his altar; but this is to be understood of the fat of these creatures when killed for their common use, for the food of them and their families; the fat even of these was not to be eaten; that which was not separated from the flesh, but mixed with it, might be eaten, but not that which was separated (l).

(l) Bechai in Leviticus 3. 17.