The iniquity of Jacob. It is the Lord’s purpose to purify His people, not to destroy them (see on vs. 7, 8). The fruit. That is, the result. The “fruit” of chastisement, repentance, and forgiveness will be the removal of every vestige of idolatry. The Babylonian captivity cured the Jews of idolatry (PK 705). As chalkstones. The stones of the altars will be crushed as if they were chalk, and the groves (Heb. ’asherim, see on Ex. 34:13; Deut. 7:5; 16:21; 2 Kings 17:10) and idols will be cast down and destroyed. God permits trials to come upon His people in order to purge them of their iniquities.