He will also keep you firm to the end, so that you will be blameless on the day of our Lord Jesus Christ.
NIV
And He will establish you to the end [keep you steadfast, give you strength, and guarantee your vindication; He will be your warrant against all accusation or indictment so that you will be] guiltless and irreproachable in the day of our Lord Jesus Christ (the Messiah).
AMP
Who shall also confirm you unto the end, that ye may be blameless in the day of our Lord Jesus Christ.
KJV