Thou prevailest for ever against him, and he passeth: thou changest his countenance, and sendest him away. Thou prevailest for ever against him - It is impossible for him to withstand thee: every stroke of thine brings him down.
Thou changest his countenance - Probably an allusion to the custom of covering the face, when the person was condemned, and sending him away to execution. See the case of Haman, in the note on Esther, Esther 7:8 (note).