2 Thessalonians 2:6-7

Amplified Bible

⁶ And you know what restrains him now [from being revealed]; it is so that he will be revealed at his own [appointed] time. ⁷ For the mystery of lawlessness [rebellion against divine authority and the coming reign of lawlessness] is already at work; [but it is restrained] only until he who now restrains it is taken out of the way.