Thou daughter that dost inhabit Dibon Thou that art exalted in pride, and rendered effeminate through luxury: Dibon being one of the chief cities of Moab; come down from thy glory, and sit in thirst Submit to a mean condition, wherein thou shalt feel the want of all the conveniences of life. The Hebrew language expresses a barren land, which yields no sustenance by a thirsty ground, Psalms 63:2; Isaiah 35:7; Ezekiel 19:13. O inhabitant of Aroer A town in the borders of Moab; stand by the way and espy, &c. The prophet describes the great concern and fear that were upon them, which made them hearken to every little report that was stirring. Howl and cry There will be just cause for a general lamentation. Judgment is come upon the plain country, &c. The inhabitants of the low grounds have suffered the punishment they deserved. The horn of Moab is cut off The authority and power of Moab are taken away. This is a metaphorical expression, taken from horned beasts, whose power to defend themselves, and injure other creatures, lies chiefly in their horns. And his arm is broken His strength is exhausted, the arm of man being the instrument whereby he chiefly discovers his strength.
Jeremiah 48:18-25
18 Thou daughter that dost inhabit Dibon, come down from thy glory, and sit in thirst; for the spoiler of Moab shall come upon thee, and he shall destroy thy strong holds.
19 O inhabitantf of Aroer, stand by the way, and espy; ask him that fleeth, and her that escapeth, and say, What is done?
20 Moab is confounded; for it is broken down: howl and cry; tell ye it in Arnon, that Moab is spoiled,
21 And judgment is come upon the plain country; upon Holon, and upon Jahazah, and upon Mephaath,
22 And upon Dibon, and upon Nebo, and upon Bethdiblathaim,
23 And upon Kiriathaim, and upon Bethgamul, and upon Bethmeon,
24 And upon Kerioth, and upon Bozrah, and upon all the cities of the land of Moab, far or near.
25 The horn of Moab is cut off, and his arm is broken, saith the LORD.