What does the Bible say about Jesus purging our sins?

Hebrews 1:3 clearly states that after Jesus 'by himself purged our sins,' he sat down on the right hand of the majesty on high. This act of sitting down denotes that the work of salvation is complete and finished. Unlike the priests of the Old Testament who continually offered sacrifices, Jesus' sacrifice was once and for all, establishing a permanent atonement for his people. The past tense of 'purged' indicates that this action occurred in history, and it affirms the complete and sufficient nature of Christ's work on the cross.