1 Corinthians 12:3

So I want to inform you that no one speaking under the power of the Spirit of God can say, "Jesus is accursed!" and no one except one under the power of the Holy Spirit can really say, "Jesus is Lord!"

1 John 4:1-3

Dearly beloved, stop believing every so-called spiritual utterance, but keep testing them to see whether they come from God, because many false prophets have gone out into the world.

Revelation 16:13-14

Then I saw three foul spirits leap like frogs from the mouth of the dragon, from the mouth of the wild beast, and from the mouth of the false prophet.

Treasury of Scripture Knowledge

Summary

To whom hast thou uttered words? and whose spirit came from thee?

Bible References

Whose spirit

1 Corinthians 12:3
So I want to inform you that no one speaking under the power of the Spirit of God can say, "Jesus is accursed!" and no one except one under the power of the Holy Spirit can really say, "Jesus is Lord!"
1 John 4:1
Dearly beloved, stop believing every so-called spiritual utterance, but keep testing them to see whether they come from God, because many false prophets have gone out into the world.
Revelation 16:13
Then I saw three foul spirits leap like frogs from the mouth of the dragon, from the mouth of the wild beast, and from the mouth of the false prophet.