1 Corinthians 12:3

Therefore I tell you plainly that no one who speaks under the influence of the Spirit of God says 'JESUS IS ACCURSED,' and that no one can say 'JESUS IS LORD,' except under the influence of the Holy Spirit.

1 John 4:1-3

Dear friends, do not trust every inspiration, but test each inspiration, to see whether it proceeds from God; because many false Prophets have gone out into the world.

Revelation 16:13-14

And I saw three foul spirits, like frogs, come from the mouth of the Dragon and from the mouth of the 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
Therefore I tell you plainly that no one who speaks under the influence of the Spirit of God says 'JESUS IS ACCURSED,' and that no one can say 'JESUS IS LORD,' except under the influence of the Holy Spirit.
1 John 4:1
Dear friends, do not trust every inspiration, but test each inspiration, to see whether it proceeds from God; because many false Prophets have gone out into the world.
Revelation 16:13
And I saw three foul spirits, like frogs, come from the mouth of the Dragon and from the mouth of the Beast and from the mouth of the false Prophet.