1 Kings 12:18 - Joseph Benson’s Commentary on the Old and New Testaments

Then Rehoboam sent Adoram, who was over the tribute To pursue the counsel which he had resolved upon, say some; to execute his office, and exact their tribute with rigour, and, if need were, with violence. But it is much more probable that he sent him to treat with them; which was a new piece of imprudence when they were so highly exasperated. And to send the person for this purpose, that was over the tribute, with promises, perhaps, of easing them, when it was too late, was certainly the height of folly; for people generally hate those that are any way employed in collecting the tributes and taxes imposed upon them. And all Israel stoned him with stones, that he died He was so odious among them that the very sight of him made them outrageous, and in a general tumult; they committed this barbarous act, and thereby violated the law of all nations, which prohibits any injury to be offered to the person of a king's ambassador. Therefore King Rehoboam made speed to flee to Jerusalem From Shechem, where he yet was with his friends and guards about him. For, it seems, he had continued there in the midst of his kingdom, and among the seditious tribes, that he might overawe them by his presence, and repress any tumults in their first rise: but from thence, as soon as he saw himself in danger, he fled away in his chariot, with all speed, in the most cowardly manner, notwithstanding the haughtiness he had lately manifested, and the big words he had spoken. This seems to have been a still further degree of imprudence; for he should, if possible, have maintained his ground, and kept footing, as we speak, in the country of Israel, from whence it might not have been easy for them to expel him: but fear is a bad adviser. This is the first time that we find a king riding in a chariot; for we never read of Saul, or David, or Solomon riding in one. But after the division of the kingdom there is frequent mention of the use of chariots, both by the kings of Judah and Israel.