9. By this—exile of Israel (the "sending away," Isa 27:8).
purged—expiated [Horsley].
all the fruit—This is the whole benefit designed to be brought about by the chastisement; namely, the removal of his (Israel's) sin (namely, object of idolatry; De 9:21; Ho 10:8).
when he—Jehovah; at the destruction of Jerusalem by Nebuchadnezzar, His instrument. The Jews ever since have abhorred idolatry (compare Isa 17:8).
not stand up—shall rise no more [Horsley].