6 Bible Verses about Testing Spirits

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.

and to another workings of miracles; and to another prophecy; and to another discerning of spirits; to another different kinds of languages; and to another the interpretation of languages.

By this you know the Spirit of God: every spirit who confesses that Jesus Christ has come in the flesh is of God, and every spirit who doesn't confess that Jesus Christ has come in the flesh is not of God, and this is the spirit of the Antichrist, of whom you have heard that it comes. Now it is in the world already. You are of God, little children, and have overcome them; because greater is he who is in you than he who is in the world.read more.
They are of the world. Therefore they speak of the world, and the world hears them. We are of God. He who knows God listens to us. He who is not of God doesn't listen to us. By this we know the spirit of truth, and the spirit of error.

Now these were more noble than those in Thessalonica, in that they received the word with all readiness of the mind, examining the Scriptures daily to see whether these things were so.

Test all things, and hold firmly that which is good.

From infancy, you have known the holy Scriptures which are able to make you wise for salvation through faith, which is in Christ Jesus. Every Scripture is God-breathed and profitable for teaching, for reproof, for correction, and for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work.