Charles Ellicott Commentary Isaiah 15:2

"They are gone up to Bayith, and to Dibon, to the high places, to weep: Moab waileth over Nebo, and over Medeba; on all their heads is baldness, every beard is cut off." — Isaiah 15:2 (ASV)

He is gone up to Bajith ... —The noun is better taken not as a proper name, but as “the house” or “temple” of the Moabite god. In this and in the “high places” (Bamôth) we may probably recognize the Bamoth-baal (high places of Baal) which appears in Joshua 13:17, side by side with Dibon, and the Beth-Bamoth of the Moabite stone (Records of the Past, Vol. 11, p. 167). That stone was, it may be noted, found at Dibân, which stands on two hills, and represents the ancient city of that name. What the prophet sees as following the destruction of Ar and Kir is the terror that leads people to join in solemn processional prayers to the temples of their gods.

Nebo. —Not the mountain that bore that name as such (Deuteronomy 34:1), but a city named after the same deity. Mesha boasts of having taken it and killed seven thousand men (Records of the Past, Vol. 11, p. 166). Medeba is named by him (in the same source) as having been taken by Omri and held by the Israelites for forty years.

On all their heads shall be baldness ... —This, originally, perhaps, sacrificial in its character, became at a very early period a symbol of most intense sorrow among Eastern nations. It was forbidden to Israel, probably because it was identified with the worship of deities other than Jehovah (Leviticus 21:5; Deuteronomy 14:1; Job 1:20; Micah 1:16; Amos 8:10).