Acts 11:8
"But I said, Not so, Lord: for nothing common or unclean hath at any time entered into my mouth."
Cross References (ranked by relevance)
I know, and am persuaded by the Lord Jesus, that there is nothing unclean of itself: but to him that esteemeth any thing to be unclean, to him it is unclean.
For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy.
They shall not dwell in the LORD’s land; but Ephraim shall return to Egypt, and they shall eat unclean things in Assyria.
To make a difference between the unclean and the clean, and between the beast that may be eaten and the beast that may not be eaten.
And that ye may put difference between holy and unholy, and between unclean and clean;
And when they saw some of his disciples eat bread with defiled, that is to say, with unwashen, hands, they found fault.