For Solomon went after Ashtoreth, the [fertility] goddess of the Sidonians, and after Milcom the horror (detestable idol) of the Ammonites.

because they have abandoned Me and have worshiped Ashtoreth the goddess of the Sidonians, Chemosh the god of the Moabites, and Milcom the god of the sons of Ammon; and they have not walked in My ways and followed My commandments, doing what is right in My sight and keeping My statutes and My ordinances as did his father David.

The king desecrated the high places which were opposite [east of] Jerusalem, which were on the right (south) of the mount of corruption which Solomon the king of Israel had built for Ashtoreth the repulsiveness of the Sidonians, for Chemosh the repulsiveness of Moab, and for Milcom the repulsiveness of the sons (descendants) of Ammon.

Concerning the sons (descendants) of Ammon.

Thus says the Lord:
“Does Israel have no sons [to reclaim Gad from the Ammonites]?
Has he no heir?
Why then has Malcam taken possession of Gad
And [why do] his people live in the cities [of Gad]?

“Wail, O Heshbon, for Ai [in Ammon] has been destroyed!
Cry out, O daughters of Rabbah!
Wrap yourselves with sackcloth and lament (cry out in grief),
And rush back and forth inside the enclosures;
For Malcam [your powerless god] will go into exile
Together with his priests and his princes.