John Gill Commentary Jeremiah 48:21

"And judgment is come upon the plain country, upon Holon, and upon Jahzah, and upon Mephaath," — Jeremiah 48:21 (ASV)

And judgment is come upon the plain country Of Moab, which was for the most part such, especially that which lay near Arnon; the judgment of God's vengeance, punishment for sin, by the hand of the Chaldeans. The Targum is, ``they that execute vengeance are come:''

upon Holon; a city of Moab; of which see (Joshua 15:51) (21:15); it had its name perhaps from the sandy ground on which it stood. Grotius takes it to be the Alabana of Ptolemy:

and upon Jahazah: the same with Jahaz, (See Gill on Isaiah 15:4); reckoned by Grotius to be the Jadu of Ptolemy; see (Joshua 13:18);

and upon Mephaath; of which see (Joshua 13:18) (21:37); said by Grotius to be the Maipha of Ptolemy.