'Unclean' in the Bible

Jesus summoned His twelve disciples and gave them authority and power over unclean spirits, to cast them out, and to heal every kind of disease and every kind of sickness.

“Now when the unclean spirit has gone out of a man, it roams through waterless (dry, arid) places in search of rest, but it does not find it.

It is not what goes into the mouth of a man that defiles and dishonors him, but what comes out of the mouth, this defiles and dishonors him.”

But whatever [word] comes out of the mouth comes from the heart, and this is what defiles and dishonors the man.

These are the things which defile and dishonor the man; but eating with [ceremonially] unwashed hands does not defile the man.”