Acts 11:8

But I said, In no wise, Lord: for nothing common or unclean hath ever entered into my mouth.

Romans 14:14

I know and am assured by the Lord Jesus, that nothing is unclean of itself: but to him that accounteth any thing to be unclean, it is unclean.

Mark 7:2

And they saw some of his disciples eat bread with defiled, that is, unwashen hands.

1 Corinthians 7:14

For the unbelieving husband hath been sanctified by the wife; and the unbelieving wife hath been sanctified by the husband. Else were your children unclean; but now they are holy.

Treasury of Scripture Knowledge

Summary

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

Bible References

Common

Mark 7:2
And they saw some of his disciples eat bread with defiled, that is, unwashen hands.
Romans 14:14
I know and am assured by the Lord Jesus, that nothing is unclean of itself: but to him that accounteth any thing to be unclean, it is unclean.