And I will cleanse them from all their iniquity, whereby they have sinned against me; and I will pardon all their iniquities, whereby they have sinned, and whereby they have transgressed against me.
I will cleanse them - (Ezekiel 36:25; Zechariah 13:1; Hebrews 9:13-14, "How much more shall the blood of Christ, who through the eternal Spirit offered Himself without spot to God, purge your conscience from dead works to serve the living God!") Alluding to the legal rites of purification.
From all their iniquity ... all their iniquities - from both the principle of sin within and its outward manifestations in acts. The repetition is in order that the Jews may consider how great is the grace of God in not merely pardoning (as to the punishment), but also cleansing them (as to the pollution of guilt); not merely one iniquity, but all (Micah 7:18-19).