'Unclean' in the Bible

who had come to listen to Him and to be healed of their diseases. Even those who were troubled by unclean spirits (demons) were being healed.

Now He was [already] commanding the unclean spirit to come out of the man. For it had seized him [violently] many times; and he was kept under guard and bound with chains and shackles, but he would break the bonds and be driven by the demon into the desert.

Even while the boy was coming, the demon slammed him down and threw him into a [violent] convulsion. But Jesus rebuked the unclean spirit, and healed the boy and gave him back to his father.

“When the unclean spirit comes out of a person, it roams through waterless places in search [of a place] of rest; and not finding any, it says, ‘I will go back to my house (person) from which I came.’