1 Corinthians 12:3

wherefore I give you to understand, that no man who has the spirit of God, can pronounce Jesus anathema: and that no man can acknowledge Jesus to be the 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 are gone out into the world.

Revelation 16:13-14

and I saw three unclean spirits like frogs 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.

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 man who has the spirit of God, can pronounce Jesus anathema: and that no man can acknowledge Jesus to be the 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 are gone out into the world.
Revelation 16:13
and I saw three unclean spirits like frogs 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.