New Living Translation
And 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.

American Standard Version
being confident of this very thing, that he who began a good work in you will perfect it until the day of Jesus Christ:

Berean Study Bible
being confident of this, that He who began a good work in you will carry it on to completion until the day of Christ Jesus.

Douay-Rheims Bible
Being confident of this very thing, that he, who hath begun a good work in you, will perfect it unto the day of Christ Jesus.

English Revised Version
being confident of this very thing, that he which began a good work in you will perfect it until the day of Jesus Christ:

King James Bible
Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ:

World English Bible
being confident of this very thing, that he who began a good work in you will complete it until the day of Jesus Christ.

Young's Literal Translation
having been confident of this very thing, that He who did begin in you a good work, will perform it till a day of Jesus Christ,

Philippians 1:6 Additional Translations ...