But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things. —John 14:26

Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world. —1 John 4:1

When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost. —John 19:30

For he [Jesus] said unto him, Come out of the man, thou unclean spirit. —Mark 5:8