And it shall come to pass at that time, that I will search Jerusalem with lamps, and I will punish the men who are settled on their lees, who say in their heart, LORD will not do good, nor will he do evil.

Moab has been at ease from his youth, and he has settled on his lees, and has not been emptied from vessel to vessel, nor has he gone into captivity. Therefore his taste remains in him, and his scent is not changed.