Luke 11:41

But give what is in them in alms, and behold all things are clean to you.

Acts 10:15-16

And the voice came to him again, the second time, What God hath purified, call not thou common.

Acts 10:28

And he said to them, Ye know it is unlawful for a Jew to join with or come to one of another nation; but God hath shewed me, to call no man common or unclean.

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.

Romans 14:20

For meat destroy not the work of God. All things indeed are pure: but it is evil to that man who eateth with offence.

2 Corinthians 6:17

Therefore come out from among them, and be ye separate, and touch not the unclean person, saith the Lord, and I will receive you,

Titus 1:15

To the clean all things are clean; but to the defiled and unbelieving nothing is clean; but both their understanding and conscience are defiled.

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 what is in them in alms, and behold all things are clean to you.
Acts 10:15
And the voice came to him again, the second time, What God hath purified, call not thou common.
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.
2 Corinthians 6:17
Therefore come out from among them, and be ye separate, and touch not the unclean person, saith the Lord, and I will receive you,
Titus 1:15
To the clean all things are clean; but to the defiled and unbelieving nothing is clean; but both their understanding and conscience are defiled.