John Wesley on Isaiah 47:2

Millstones - Thou shalt be brought to the basest slavery, which grinding at the mill was esteemed. For this work was not performed by horses, as now it is, but by the labour of slaves and captives. Grind - Grind bread - corn into meal for thy master's use. Uncover - Take off the ornaments wherewith such women as were of good quality, used to cover and dress their heads. These are predictions of what they should be forced to do or suffer. Thigh - Gird up thy garments close and short about thee, that thou mayest be fit for travelling on foot, and for passing over those rivers, through which thou wilt be constrained to wade, in the way to the land of thy captivity.