Daniel 11:20 Then shall stand up in his estate a raiser of taxes in the glory of the kingdom: but within few days he shall be destroyed, neither in anger, nor in battle. - Free Bible Online

      20. in his estate--in Antiochus' stead: his successor, Seleucus Philopater, his son.
      in the glory of the kingdom--that is, inheriting it by hereditary right. MAURER translates, "one who shall cause the tax gatherer (Heliodorus) to pass through the glory of the kingdom," that is, Judea, "the glorious land" (Da 11:16, 41; Da 8:9). Simon, a Benjamite, in spite against Onias III, the high priest, gave information of the treasures in the Jewish temple; and Seleucus having reunited to Syria Cœlo-Syria and Palestine, the dowry formerly given by Antiochus the Great to Cleopatra, Ptolemy's wife, sent Heliodorus to Jerusalem to plunder the temple. This is narrated in 2 Maccabees 3:4, &c. Contrast Zec 9:8, "No oppressor shall pass through . . . any more."
      within few days . . . destroyed--after a reign of twelve years, which were "few" compared with the thirty-seven years of Antiochus' reign. Heliodorus, the instrument of Seleucus' sacrilege, was made by God the instrument of his punishment. Seeking the crown, in the absence at Rome of Seleucus' only son and heir, Demetrius, he poisoned Seleucus. But Antiochus Epiphanes, Seleucus' brother, by the help of Eumenes, king of Pergamos, succeeded to the throne, 175 B.C.
      neither in anger, nor in battle--not in a popular outbreak, nor in open battle.

JFB.