Leviticus 3:17 - Joseph Benson’s Commentary on the Old and New Testaments

All your dwellings Not only at or near the tabernacle, not only of those beasts which you actually sacrifice, but also in your several dwellings, and of all that kind of beasts. Fat Was forbidden, 1st, To preserve the reverence of the holy rites and sacrifices. 2d, That they may be taught hereby to acknowledge God as their Lord, and the Lord of all the creatures, who might reserve what he pleased to himself. 3d, To exercise them in obedience to God, and self-denial and mortification of their appetites, even in those things which probably many of them would much desire. Blood Was forbidden, partly to maintain reverence to God and his worship; partly, according to Maimonides, out of opposition to idolaters, who used to drink the blood of their sacrifices; partly, with respect to Christ's blood, thereby manifestly signified. God would not permit the very shadows of this to be used as a common thing. Nor will he allow us, though we have the comfort of the atonement made, to assume to ourselves any share in the honour of making it.