He saved us, not because of righteous things we had done, but because of his mercy. He saved us through the washing of rebirth and renewal by the Holy Spirit (NIV)

He saved us, not because of any works of righteousness that we had done, but because of His own pity and mercy, by [the] cleansing [bath] of the new birth (regeneration) and renewing of the Holy Spirit (AMP)

Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost; (KJV)