Jamieson, Fausset and Brown on Daniel 11:19

19. Then he shall turn ... toward ... his own land--Compelled by Rome to relinquish all his territory west of the Taurus, and defray the expenses of the war, he garrisoned the cities left to him.

stumble ... not be found--Attempting to plunder the temple of Jupiter at Elymais by night, whether through avarice, or the want of money to pay the tribute imposed by Rome (a thousand talents), he was slain with his soldiers in an insurrection of the inhabitants [Justin, 32.2].