Just like Chemosh, the god of Moab (see Jeremiah 48:7), so Milcom, the god of Ammon, will be defeated and taken into exile with those who serve in his temples. Nothing underscores the defeat of a people quite like their god and priests been dragged away to a foreign place.
3 “Wail, O Heshbon, for Ai is laid waste! Cry out, O daughters of Rabbah! Put on sackcloth, lament, and run to and fro among the hedges! For Milcom shall go into exile, with his priests and his officials.