And he saw a chariot, etc. "And he saw a chariot with two riders; a rider on an ass, a rider on a camel" - This passage is extremely obscure from the ambiguity of the term רכב recheb, which is used three times, and which signifies a chariot, or any other vehicle, or the rider in it; or a rider on a horse, or any other animal; or a company of chariots, or riders. The prophet may possibly mean a cavalry in two parts, with two sorts of riders; riders on asses or mules, and riders on camels; or led on by two riders, one on an ass, and one on a camel. However, so far it is pretty clear, that Darius and Cyrus, the Medes and the Persians, are intended to be distinguished by the two riders on the two sorts of cattle. It appears from Herodotus, 1:80, that the baggage of Cyrus' army was carried on camels. In his engagement with Croesus, he took off the baggage from the camels, and mounted his horsemen upon them; the enemy's horses, offended with the smell of the camels, turned back and fled. - L.

and he saw

Isaiah 21:9 And, behold, here comes a chariot of men, with a couple of horsemen. And he answered and said, Babylon is fallen, is fallen...

Isaiah 37:24 By your servants have you reproached the Lord, and have said, By the multitude of my chariots am I come up to the height of the mountains...

he harkened.

Hebrews 2:1 Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.

Isaiah
CHAPTERS I-XXXIX Isaiah is the most regal of the prophets. His words and thoughts are those of a man whose eyes had seen the King, vi. 5. The times in which he lived were big with political problems, which he met as a statesman who saw the large meaning of events, and as a prophet who read a divine purpose in history. Unlike his younger contemporary Micah, he was, in all probability, an aristocrat; and during his long ministry (740-701 B.C., possibly, but not probably later) he bore testimony, as …
John Edgar McFadyen—Introduction to the Old Testament