Leviticus 13:34
And in the seventh day the priest shall look on the scall; and if the scall is not spread in the skin nor in appearance deeper than the skin, then the priest shall pronounce him clean; and he shall wash his clothes and be clean.
1 John 4:1
Beloved, do not believe every spirit, but try the spirits whether they are of God because many false prophets are gone out into the world.
Jude 1:22
And receive some with mercy, discerning;
Revelation 2:2
I know thy works and thy labour and thy patience and how thou canst not bear those who are evil; and thou hast tried those who say they are apostles and are not and hast found them liars,