1 Corinthians 12:3

Wherefore I want you to understand that no one who speaks in the Spirit of God says, "Jesus is accursed," and no one can say, "Jesus is Lord," except in the Holy Spirit.

1 John 4:1-3

Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.

Revelation 16:13-14

And I saw three unclean spirits, like frogs, coming out of the dragon's mouth, and the beast's mouth, and the false prophet's mouth.

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
Wherefore I want you to understand that no one who speaks in the Spirit of God says, "Jesus is accursed," and no one can say, "Jesus is Lord," except in the Holy Spirit.
1 John 4:1
Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.
Revelation 16:13
And I saw three unclean spirits, like frogs, coming out of the dragon's mouth, and the beast's mouth, and the false prophet's mouth.