2 Thessalonians 1:6-8

6 Since it is a righteous thing with God to repay affliction to those who afflict you,  7 and to give relief to you that are afflicted with us, when the Lord Jesus is revealed from heaven with his mighty angels in flaming fire,  8 giving vengeance to those who don't know God, and to those who don't obey the gospel of our Lord Jesus, 

2 Thessalonians 2:1-8

1 Now, brothers, concerning the coming of our Lord Jesus Christ, and our gathering together to him, we ask you  2 not to be quickly shaken in your mind, nor yet be troubled, either by spirit, or by word, or by letter as from us, saying that the day of Christ had come.  3 Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction,  4 he who opposes and exalts himself against all that is called God or that is worshiped; so that he sits as God in the temple of God, setting himself up as God.  5 Don't you remember that, when I was still with you, I told you these things?  6 Now you know what is restraining him, to the end that he may be revealed in his own season.  7 For the mystery of lawlessness already works. Only there is one who restrains now, until he is taken out of the way.  8 Then the lawless one will be revealed, whom the Lord will kill with the breath of his mouth, and bring to nothing by the brightness of his coming;