2 Thessalonians 1:10; 2 Thessalonians 2:3

10 when He comes to be glorified in His saints on that day, and to be marveled at among all who have believed -for our testimony to you was believed.
3 Let no one in any way deceive you, for it will not come unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction,