American Standard Version
when he shall come to be glorified in his saints, and to be marvelled at in all them that believed (because our testimony unto you was believed) in that day.

Berean Study Bible
on the day He comes to be glorified in His saints and regarded with wonder by all who have believed, including you who have believed our testimony.

Douay-Rheims Bible
When he shall come to be glorified in his saints, and to be made wonderful in all them who have believed; because our testimony was believed upon you in that day.

English Revised Version
when he shall come to be glorified in his saints, and to be marveled at in all them that believed (because our testimony unto you was believed) in that day.

King James Bible
When he shall come to be glorified in his saints, and to be admired in all them that believe (because our testimony among you was believed) in that day.

World English Bible
when he comes to be glorified in his saints, and to be admired among all those who have believed (because our testimony to you was believed) in that day.

Young's Literal Translation
when He may come to be glorified in his saints, and to be wondered at in all those believing -- because our testimony was believed among you -- in that day;

2 Thessalonians 1:10 Additional Translations ...