20. heifer—wanton, like a fat, untamed heifer (Ho 10:11). Appropriate to Egypt, where Apis was worshipped under the form of a fair bull marked with spots.
destruction—that is, a destroyer: Nebuchadnezzar. Vulgate translates, "a goader," answering to the metaphor, "one who will goad the heifer" and tame her. The Arabic idiom favors this [Rosenmuller].
cometh … cometh—The repetition implies, it cometh surely and quickly (Ps 96:13).
out of the north—(See on Jer 1:14; Jer 47:2).