Amos 1:15

He finally adds, And their king shall go into captivity, he and his princes together As מלכם, melcam, was an idol of the people, some regard it here as a proper name; but he says, מלכם הוא ושריו, melcam eva ushariu, ‘their king, he and his princes;’ hence the Prophet, no doubt, names the king of Ammon, for he joins with him his princes. He says then that the ruin of the kingdom would be such, that the king himself would be led captive by the Assyrians. This prediction was no doubt fulfilled, though there is no history of it extant.