Rashi on Isaiah
And I will return My hand upon you One blow after another, until the transgressors have been completely destroyed.
Rashi on Isaiah
as with lye This is an expression meaning soap [sbon in O.F., savon (in modern French)]. Its deviation is an expression of cleanliness, similar to (Ps. 24:4): “and pure (בַּר) of heart,” since it cleanses the garment of its stains.