1 John 4:1

Testing the Spirits

4:1 Dear friends, do not believe every spirit, but test the spirits to determine if they are from God, because many false prophets have gone out into the world.

Jude 1:22

1:22 And have mercy on those who waver;

Revelation 2:2

2:2 ‘I know your works as well as your labor and steadfast endurance, and that you cannot tolerate evil. You have even put to the test those who refer to themselves as apostles (but are not), and have discovered that they are false.