Leviticus 13:34
The priest will again examine the sore on the seventh day. If it has not spread and does not seem to be deeper than the surrounding skin, he will declare you ritually clean. You will wash your clothes. You will be clean.
1 John 4:1
Beloved, do not believe every spirit. Test the spirits to see whether they are from God. This is because many false prophets have gone out into the world.
Jude 1:22
Show mercy to some who have doubt.
Revelation 2:2
I know your works, and your labor, and your patience. I also know how you cannot tolerate those who are evil. You tested those who say they are apostles. They are not apostles. You found them to be liars.