'Common or Unclean' in the Bible

But Peter said, Not so, Lord; for I have never eaten any thing that is common or unclean.

And he said to them, Ye know that it is an unlawful thing for a man that is a Jew to keep company, or come to one of another nation; but God hath shown me that I should not call any man common or unclean.

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