American Standard Version
night and day praying exceedingly that we may see your face, and may perfect that which is lacking in your faith?

Berean Study Bible
Night and day we pray most earnestly that we may see you face to face and supply what is lacking from your faith.

Douay-Rheims Bible
Night and day more abundantly praying that we may see your face, and may accomplish those things that are wanting to your faith?

English Revised Version
night and day praying exceedingly that we may see your face, and may perfect that which is lacking in your faith?

King James Bible
Night and day praying exceedingly that we might see your face, and might perfect that which is lacking in your faith?

World English Bible
night and day praying exceedingly that we may see your face, and may perfect that which is lacking in your faith?

Young's Literal Translation
night and day exceedingly beseeching, that we might see your face, and perfect the things lacking in your faith.

1 Thessalonians 3:10 Additional Translations ...