Jonah 1:1

Observe, 1. The honour God put upon Jonah, in giving him a commission to go and prophesy against Nineveh. Jonah signifies a dove, a proper name for all God's prophets, all his people, who ought to be harmless as doves, and to mourn as doves for the sins and calamities of the land. His father's name was Amittai - My truth; for God's prophets should be sons of truth. To him the word of the Lord came - to him it was (so the word signifies), for God's word is a real thing; men's words are but wind, but God's words are substance. He has been before acquainted with the word of the Lord, and knew his voice from that of a stranger; the orders now given him were, Arise, go to Nineveh, that great city, Jon 1:2. Nineveh was at this time the metropolis of the Assyrian monarchy, an eminent city (Gen 10:11), a great city, that great city, forty-eight miles in compass (some make it much more), great in the number of the inhabitants, as appears by the multitude of infants in it (Jon 4:11), great in wealth (there was no end of its store, Nah 2:9), great in power and dominion; it was the city that for some time ruled over the kings of the earth. But great cities, as well as great men, are under God's government and judgment.

— Matthew Henry's Concise Commentary (public domain)