'Unclean Spirit' in the Bible

Then amazement came over them all; they talked it over among themselves, saying, "What does this mean? He orders the unclean spirits with authority and power, and they come out!"

Those who were annoyed with unclean spirits also were healed.

(For he had charged the unclean spirit to come out of the man. Many a time when it had seized hold of him, he had been fastened secure in fetters and chains, but he would snap his bonds and be driven by the daemon into the desert.)

Before the boy could reach Jesus, the daemon dashed him down and convulsed him, but Jesus checked the unclean spirit, cured the boy, and handed him back to his father.

When an unclean spirit leaves a man, it roams through dry places in search of refreshment. As it finds none, then it says, 'I will go back to the house I left,'