'Common or Unclean' in the Bible

But Peter said, "God forbid Lord, for I have never eaten anything that is common or unclean."

And he said unto them, "Ye do know how that it is an unlawful thing for a man that is a Jew to company or come unto an alien: But God hath showed me that I should not call any man common or unclean:

And I said, 'God forbid Lord, for nothing common or unclean hath at any time entered into my mouth.'