on that day when he comes to be glorified in his saints, and to be marveled at by all who have believed, because our testimony to you (hymas | ὑμᾶς | acc pl 2nd) was believed.
and to give relief to you (hymin | ὑμῖν | dat pl 2nd) who are afflicted, and to us as well, when the Lord Jesus is revealed from heaven with his mighty angels
This is evidence of the righteous judgment of God, and results in your (hymas | ὑμᾶς | acc pl 2nd) being considered worthy of the kingdom of God, for which you are indeed suffering.
so that we ourselves boast about you (hymin | ὑμῖν | dat pl 2nd) in the churches of God for your (hymōn | ὑμῶν | gen pl 2nd) patience and faith in all the persecutions and afflictions that you are enduring.
We ought always to thank God for you (hymōn | ὑμῶν | gen pl 2nd), brothers, as is fitting, because your (hymōn | ὑμῶν | gen pl 2nd) faith is growing abundantly, and the love of each one of you (hymōn | ὑμῶν | gen pl 2nd) for one another is increasing,