Moab from the time it conquered the Emims Deuteronomy 2:9-10, and so became a nation, had retained quiet possession of its land, and enjoyed comparative prosperity. From the Moabite Stone we gather that King Mesha, after the death of Ahab threw off the yoke of Israel; nor except for a short time under Jeroboam II was Israel able to bring the Moabites back into subjection. They gradually drove the Reubenites back, and recovered most of the territory taken from the Amorites by Moses, and which originally had belonged to them.
He hath settled on his lees - Good wine was thought to be the better for being left to stand upon its sediment Isaiah 25:6, and in all cases its flavor was rendered thereby stronger (marginal reference). “By being emptied from vessel to vessel” it became vapid and tasteless. So a nation by going into captivity is rendered tame and feeble. By his taste is meant the flavor of the wine, and so Moab’s national character.