Luke 11:41

But give your inmost life as charity, and you will immediately find everything clean.

Acts 10:15-16

The voice came to him again a second time, "Do not call what God has cleansed unclean."

Acts 10:28

and he said to them, "You know that it is against the Law for a Jew to associate with a foreigner or to visit one; but God has taught me not to call anyone vulgar or unclean.

Romans 14:14

I know and as a follower of the Lord Jesus I am convinced that nothing is unclean in itself; a thing is unclean only to the man who regards it as unclean.

Romans 14:20

You must not, just for the sake of food, undo the work of God. It is true, everything is clean, but it is wrong for a man to hurt the consciences of others by what he eats.

2 Corinthians 6:17

Therefore, "Come out from them, And separate from them, says the Lord, And touch nothing that is unclean. Then I will welcome you,

Titus 1:15

To the pure everything is pure, but to the evil-minded and unbelieving nothing is pure, but their very minds and consciences are unclean.

Treasury of Scripture Knowledge

Summary

And the flesh that toucheth any unclean thing shall not be eaten; it shall be burnt with fire: and as for the flesh, all that be clean shall eat thereof.

Bible References

General references

Luke 11:41
But give your inmost life as charity, and you will immediately find everything clean.
Acts 10:15
The voice came to him again a second time, "Do not call what God has cleansed unclean."
Romans 14:14
I know and as a follower of the Lord Jesus I am convinced that nothing is unclean in itself; a thing is unclean only to the man who regards it as unclean.
2 Corinthians 6:17
Therefore, "Come out from them, And separate from them, says the Lord, And touch nothing that is unclean. Then I will welcome you,
Titus 1:15
To the pure everything is pure, but to the evil-minded and unbelieving nothing is pure, but their very minds and consciences are unclean.