And he saw a chariot with a couple of horsemen, a chariot of donkeys, and {k} a chariot of camels; and he hearkened diligently with much heed:

(k) Meaning, chariots of men of war, and others that carried the baggage.

Wesley's Notes

21:7 A chariot - Hereby he signifies the variety and abundance of warlike provisions which the Medes and Persians should have for their expedition, and particularly of chariots, whereof some were for the carriage of necessary things, and others for the battle.

Jamieson-Fausset-Brown Bible Commentary

7. chariot, &c.-rather, "a body of riders," namely, some riding in pairs on horses (literally, "pairs of horsemen," that is, two abreast), others on asses, others on camels (compare Isa 21:9; Isa 22:6). "Chariot" is not appropriate to be joined, as English Version translates, with "asses"; the Hebrew means plainly in Isa 21:7, as in Isa 21:9, "a body of men riding." The Persians used asses and camels for war [Maurer]. Horsley translates, "One drawn in a car, with a pair of riders, drawn by an ass, drawn by a camel"; Cyrus is the man; the car drawn by a camel and ass yoked together and driven by two postilions, one on each, is the joint army of Medes and Persians under their respective leaders. He thinks the more ancient military cars were driven by men riding on the beasts that drew them; Isa 21:9 favors this.

Matthew Henry's Concise Commentary

21:1-10 Babylon was a flat country, abundantly watered. The destruction of Babylon, so often prophesied of by Isaiah, was typical of the destruction of the great foe of the New Testament church, foretold in the Revelation. To the poor oppressed captives it would be welcome news; to the proud oppressors it would be grievous. Let this check vain mirth and sensual pleasures, that we know not in what heaviness the mirth may end. Here is the alarm given to Babylon, when forced by Cyrus. An ass and a camel seem to be the symbols of the Medes and Persians. Babylon's idols shall be so far from protecting her, that they shall be broken down. True believers are the corn of God's floor; hypocrites are but as chaff and straw, with which the wheat is now mixed, but from which it shall be separated. The corn of God's floor must expect to be threshed by afflictions and persecutions. God's Israel of old was afflicted. Even then God owns it is his still. In all events concerning the church, past, present, and to come, we must look to God, who has power to do any thing for his church, and grace to do every thing that is for her good.