1 Corinthians 12:3

For this reason I would have you understand that no one speaking under the influence of The Spirit of God ever says, "Jesus is accursed," and that no one is able to say, "Jesus is Lord," except under the influence of the Holy Spirit.

1 John 4:1-3

Dear friends, do not believe every spirit, but put the spirits to the test to see whether they are from God; for many false teachers have gone out into the world.

Revelation 16:13-14

Then I saw three foul spirits, resembling frogs, issue from the mouth of the Dragon, from the mouth of the Wild Beast, and from 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
For this reason I would have you understand that no one speaking under the influence of The Spirit of God ever says, "Jesus is accursed," and that no one is able to say, "Jesus is Lord," except under the influence of the Holy Spirit.
1 John 4:1
Dear friends, do not believe every spirit, but put the spirits to the test to see whether they are from God; for many false teachers have gone out into the world.
Revelation 16:13
Then I saw three foul spirits, resembling frogs, issue from the mouth of the Dragon, from the mouth of the Wild Beast, and from the mouth of the false Prophet.