1 Corinthians 12:3

I must acquaint you, that no one speaking by the Spirit of God, calleth Jesus a curse: and no one can say that 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 be of God: for many false prophets are gone out into the world.

Revelation 16:13-14

And I saw coming 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 impure 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
I must acquaint you, that no one speaking by the Spirit of God, calleth Jesus a curse: and no one can say that Jesus is the Lord, but by the holy Ghost.
1 John 4:1
Beloved, believe not every Spirit, but try the spirits, whether they be of God: for many false prophets are gone out into the world.
Revelation 16:13
And I saw coming 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 impure spirits like frogs: