2 Thessalonians 1:4-6

so that we ourselves glory in you in the churches of God for your patience and faith in all your persecutions and in the afflictions which ye endure; which is a manifest token of the righteous judgment of God; to the end that ye may be counted worthy of the kingdom of God, for which ye also suffer: if so be that it is a righteous thing with God to recompense affliction to them that afflict you