What does the Bible say about eternal redemption?

In Hebrews 9:12, it is stated that Christ, by His own blood, entered into the holy place, having obtained eternal redemption for us. This emphasizes the finality and sufficiency of His sacrifice. Unlike the old covenant sacrifices that had to be repeated, Christ's sacrifice was unique and effective, offering a one-time redemption that secures the eternal salvation of His people. The theme of eternal redemption is woven throughout the New Testament, particularly in Ephesians 1, where the redemption through His blood is highlighted as a key aspect of divine grace available to the believers.