Matthew Poole and continuators on Amos 1:15

15 And their king shall go into captivity, he , and his princes together, saith the LORD .

Or, Milchom, or Moloch the Idol of the Ammonites, so it signifieth, as well as King. I suppose the Prophet may intend both, their God as well as their King shall be carried captive, as was customary with Conquerours, 1 Sam. 5.2. and Isa. 46.2.

This repeats and confirms the threat, whether it refer to the Idol or the King.

Either Nobles and Ministers of State, who attend and serve the King, or the Priests and Ministers of the Idol, here both may be included, and the utter overthrow of their Affairs in Religion, and State be signified and foretold.

This, as elsewhere doth ratifie and ensure all; it shall so be, for God hath spoken it.