Albert Barnes Commentary Daniel 11:19

"Then he shall turn his face toward the fortresses of his own land; but he shall stumble and fall, and shall not be found." — Daniel 11:19 (ASV)

Then he shall turn his face toward the fort of his own land—The strong fortifications of his own land—for the Hebrew word is in the plural. He would do this, of course, for protection. He would cease his attempts at conquest and endeavor to find security in his own fortresses. As a matter of fact, after this defeat, Antiochus, in order to replenish his exhausted coffers and to find the means of meeting the claims of the Romans, went into certain provinces of his empire. He attempted no other foreign wars but sought security in his own dominions.

But he shall stumble and fall, and not be found—He died in an attempt to plunder the temple of Elymais. In this, he provoked the people to an insurrection and was slain, together with the soldiers who were with him. What was his motive for plundering that temple is uncertain, whether it was to meet the demands of the Romans or whether it was avarice ; but it was in this way that he stumbled and fell, and passed away. —Jerome, Commentary in loco; Diodorus.

Diodorus Siculus, “Fragmenta,” 26:30, 49; Justin 32:2; Strabo, p. 744. The prophecy respecting him terminates here, and the particulars specified are as minute and accurate as if it had been written after the event. Indeed, the whole account is just such as one would prepare now who should undertake to express concisely the principal events in the life of Antiochus the Great.