Leviticus 13:34
On the seventh day, the priest shall examine the itch; and behold, if the itch hasn't spread in the skin, and its appearance isn't deeper than the skin, then the priest shall pronounce him clean. He shall wash his clothes, and be clean.
1 John 4:1
Beloved, don't believe every spirit, but test the spirits, whether they are of God, because many false prophets have gone out into the world.
Jude 1:22
On some have compassion, making a distinction,
Revelation 2:2
"I know your works, and your toil and perseverance, and that you can't tolerate evil men, and have tested those who call themselves apostles, and they are not, and found them false.