'Unclean' in the Bible

And there also came together the multitudes from the cities round about Jerusalem, bring sick folk, and them that were vexed with unclean spirits: and they were healed every one.

For from many of those that had unclean spirits, they came out, crying with a loud voice: and many that were palsied, and that were lame, were healed.

But Peter said, Not so, Lord; for I have never eaten anything that is common and unclean.

and he said unto them, Ye yourselves know how it is an unlawful thing for a man that is a Jew to join himself or come unto one of another nation; and yet unto me hath God showed that I should not call any man common or unclean:

But I said, Not so, Lord: for nothing common or unclean hath ever entered into my mouth.