Luke 11:41

But as to what is within, give alms, and instantly all is clean in you.

Acts 10:15-16

Again a second time a voice was heard which said, "What God has purified, you must not regard as unholy."

Acts 10:28

He said to them, "You know better than most that a Jew is strictly forbidden to associate with a Gentile or visit him; but God has taught me to call no one unholy or unclean.

Romans 14:14

As one who lives in union with the Lord Jesus, I know and am certain that in its own nature no food is 'impure'; but if people regard any food as impure, to them it is.

Romans 14:20

Do not for food's sake be throwing down God's work. All food is pure; but a man is in the wrong if his food is a snare to others.

2 Corinthians 6:17

Therefore, "'Come out from among them and separate yourselves,' says the Lord, 'and touch nothing impure; and I will receive you, and will be a Father to you,

Titus 1:15

To the pure everything is pure; but to the polluted and unbelieving nothing is pure, but on the contrary their very minds and consciences are polluted.

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 as to what is within, give alms, and instantly all is clean in you.
Acts 10:15
Again a second time a voice was heard which said, "What God has purified, you must not regard as unholy."
Romans 14:14
As one who lives in union with the Lord Jesus, I know and am certain that in its own nature no food is 'impure'; but if people regard any food as impure, to them it is.
2 Corinthians 6:17
Therefore, "'Come out from among them and separate yourselves,' says the Lord, 'and touch nothing impure; and I will receive you, and will be a Father to you,
Titus 1:15
To the pure everything is pure; but to the polluted and unbelieving nothing is pure, but on the contrary their very minds and consciences are polluted.