fat: Any other fat they might eat; but the fat of these was sacred, because they were the only animals which were offered in sacrifice, though many others ranked among the clean animals as well as these.
This prohibition may, however, be understood of these animals when offered in sacrifice, and then only in reference to the inward fat, described in Leviticus 7:4. Of the fat in any other circumstances, it cannot be intended, as it was one of the especial blessings which God gave to his people - "Butter of kine, and milk of sheep, with fat of lambs, and rams of the breed of Bashan, and goats," were the provision which he graciously bestowed on his followers.
(See note on Deuteronomy 32:12-14.