Philippians 1 6
I'm absolutely sure that God who began this good work in you will continue working and bring it to a successful conclusion when Jesus Christ returns.
Compare with other 3 random translations
NCV Philippians 1:6God began doing a good work in you, and I am sure he will continue it until it is finished when Jesus Christ comes again.
NLT Philippians 1:6And I am certain that God, who began the good work within you, will continue his work until it is finally finished on the day when Christ Jesus returns.
NIV Philippians 1:6being confident of this, that he who began a good work in you will carry it on to completion until the day of Christ Jesus.