John Gill Commentary 2 Kings 9:23

"And Joram turned his hands, and fled, and said to Ahaziah, There is treachery, O Ahaziah." — 2 Kings 9:23 (ASV)

And Joram turned his hand, and fled
Taking hold of the horses' reins with it to turn them, or by the motion of it directing the charioteer to turn them back towards Jezreel, where he fled:

and said to Ahaziah, there is treachery, O Ahaziah ;
a conspiracy formed, and rebellion raised by the captains, at the head of which he supposed Jehu was.