1 Corinthians 12:3

wherefore I give you to understand that no one speaking by the Spirit of God saith, Accursed be Jesus; and that no one can say, Jesus is Lord, but by the Holy Spirit.

1 John 4:1-3

Beloved, believe not every spirit, but try the spirits, whether they are of God; because many false prophets have gone forth into the world.

Revelation 16:13-14

And I saw come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three unclean spirits like frogs;

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 give you to understand that no one speaking by the Spirit of God saith, Accursed be Jesus; and that no one can say, Jesus is Lord, but by the Holy Spirit.
1 John 4:1
Beloved, believe not every spirit, but try the spirits, whether they are of God; because many false prophets have gone forth into the world.
Revelation 16:13
And I saw come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three unclean spirits like frogs;