Matthew Poole and continuators on Deuteronomy 32:14

14 Butter of kine, and milk of sheep with fat of lambs , and rams of the breed of Bashan , and goats, with the fat of kidneys of wheat , and thou didst drink the pure blood of the grape .

For though the fat wherewith the inward parts were covered was not to be eaten by them but offered to God, Lev. 3. 9, 10. yet that fat which was fast joyned to and mixed with the flesh they might eat, as the Iewish Doctours note.

A place famous for excellent cattel, Numb. 32. 4, 33.

(i. e.) With the finest of the grains or kernels of wheat compared to kidneys for their shape and plumpness and largeness. Compare Psal. 81. 16. and 147. 14.

Wine not mixed with water, but pure as it comes from the grape, which was of a red or bloody colour. See Psal. 75. 8. Isa. 27. 2.