Albert Barnes Commentary Jeremiah 48:2

"The praise of Moab is no more; in Heshbon they have devised evil against her: Come, and let us cut her off from being a nation. Thou also, O Madmen, shalt be brought to silence: the sword shall pursue thee." — Jeremiah 48:2 (ASV)

No more praise of Moab - literally, “The glory of Moab is no more,” that is, Moab has no more cause for boasting.

Heshbon - This town now belonged to the Ammonites (Jeremiah 49:3) but was on the border. The enemy encamped there arranges the plan of his campaign against Moab.

In the original there is a play of words upon the names Heshbon and Madmen.