What does the Bible say about Christ purging our sins?

In Hebrews 1:3, it is stated that Christ 'by Himself purged our sins' and sat down at the right hand of God, emphasizing that His work was complete and perfect. This means that there is no additional work needed from us to gain righteousness or salvation. The significance of Christ purging our sins by Himself is that it underscores His role as the sole mediator between God and man, ensuring that our sins are entirely dealt with through His sacrifice. The sufficiency of Christ's atonement is also reflected in Hebrews 10:14, which asserts that 'by one offering he hath perfected forever them that are sanctified,' confirming that believing in Him secures redemption without requiring human effort or merit.