1 Corinthians 12:3

Therefore I give you to know, that as no one speaking by the Spirit of God, calleth Jesus accursed; so no one can say, Jesus is the Lord, but by the Holy Ghost.

1 John 4:1-3

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

Revelation 16:13-14

And I saw out of the mouth of the dragon, and out of the mouth of the wild beast, and out of the mouth of the false prophet, three unclean spirits like frogs (They are spirits of devils,

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 give you to know, that as no one speaking by the Spirit of God, calleth Jesus accursed; so no one can say, Jesus is the Lord, but by the Holy Ghost.
1 John 4:1
Beloved, believe not every spirit, but try the spirits, whether they are of God, because many false prophets are gone out into the world.
Revelation 16:13
And I saw out of the mouth of the dragon, and out of the mouth of the wild beast, and out of the mouth of the false prophet, three unclean spirits like frogs (They are spirits of devils,