Charles Ellicott Commentary Isaiah 34:7

"And the wild-oxen shall come down with them, and the bullocks with the bulls: and their land shall be drunken with blood, and their dust made fat with fatness." — Isaiah 34:7 (ASV)

And the unicorns shall come down with them ... —Better, the aurochs, or wild bulls ... The Hebrew word rem, which appears in Deuteronomy 33:17 and Psalm 22:21, has been identified with the buffalo and the antelope (Antilope leucoryx). Additionally, Mr. Houghton, a naturalist as well as a scholar, identifies it with the Bos primigenius of zoologists (Bible Educator, ii. 24-29), an identification based on Assyrian inscriptions (pointing to the land of the Khatti (Hittites) and the foot of Lebanon as its habitat) and on bas-reliefs representing it.

Here, the fierce wild beasts stand for the chiefs of the Edomites. (Psalms 22:21.) The verb, shall come down, as in Jeremiah 48:15, Jeremiah 50:27, and Jeremiah 51:40, implies going down to the shambles, or slaughtering house.