Левит 3:17

That ye eat neither fat nor blood - It is not likely that the fat should be forbidden in the same manner and in the same latitude as the blood. The blood was the life of the beast, and that was offered to make an atonement for their souls; consequently, this was never eaten in all their generations: but it was impossible to separate the fat from the flesh, which in many parts is so intimately intermixed with the muscular fibres; but the blood, being contained in separate vessels, the arteries and veins, might with great ease be entirely removed by cutting the throat of the animal, which was the Jewish method. By the fat therefore mentioned here and in the preceding verse, we may understand any fat that exists in a separate or unmixed state, such as the omentum or caul, the fat of the mesentery, the fat on the kidneys, and whatever else of the internal fat was easily separable, together with the whole of the tail already described. And probably it was the fat of such animals only as were offered to God in sacrifice, that was unlawful to be eaten. As all temporal as well as spiritual blessings come from God, he has a right to require that such of them should be dedicated to his service as he may think proper to demand. He required the most perfect of all the animals, and the best parts of these perfect animals. This he did, not that he needed any thing, but to show the perfection of his nature and the purity of his service. Had he condescended to receive the meanest animals and the meanest parts of animals as his offerings, what opinion could his worshippers have entertained of the perfection of his nature? If such imperfect offerings were worthy of this God, then his nature must be only worthy of such offerings. It is necessary that every thing employed in the worship of…

ye eat neither fat nor blood--The details given above distinctly define the fat in animals which was not to be eaten, so that all the rest, whatever adhered to other parts, or was intermixed with them, might be used. The prohibition of blood rested on a different foundation, being intended to preserve their reverence for the Messiah, who was to shed His blood as an stoning sacrifice for the sins of the world [BROWN]. Next: Leviticus Chapter 4

INTRODUCTION TO LEVITICUS 3 This chapter contains the law of the peace offerings, and gives an account what they consisted of, and of the various rites and ceremonies used at them, as of the bullock and the rites appertaining to that, Lev 3:1 and of the lamb, and of the rites peculiar to it, Lev 3:6 and of the goat, and of the rites belonging to it, Lev 3:12 and the chapter is concluded with a law forbidding the eating of fat and blood throughout their dwellings for ever, Lev 3:17.

In this chapter we have the law concerning the peace-offerings, whether they were, I. Of the heard, a bullock or a heifer (Lev 3:1-5). Or, II. Of the flock, either a lamb (Lev 3:6-11) or a goat (Lev 3:12-17). The ordinances concerning each of these are much the same, yet they are repeated, to show the care we ought to take that all our services be done according to the appointment and the pleasure God takes in the services that are so performed. It is likewise to intimate what need we have of precept upon precept, and line upon line.

3:17 Human beings were not permitted to eat the fat or blood (see 1:5, 8 and study notes).