Luke 11:41

be but charitable to the utmost of your ability, and every thing will be pure to you.

Acts 10:15-16

and the voice spake to him again the second time, don't call that common, which God calls clean.

Acts 10:28

said he, how unlawful it is for a Jew, to frequent a stranger, or even to go to his house: but God hath shewed me, that I should not look upon any man as common and unclean.

Romans 14:14

I know, being fully assured by the Lord Jesus, that there is nothing unclean of itself: it is only so to him that thinks it is unclean.

Romans 14:20

do not for such a thing as meat, pull down what God has been raising. all things indeed are pure; but they become evil to him who by eating giveth offence.

2 Corinthians 6:17

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

Titus 1:15

to the pure all things are pure: but to corrupt infidels nothing is pure; whose very mind and conscience is 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
be but charitable to the utmost of your ability, and every thing will be pure to you.
Acts 10:15
and the voice spake to him again the second time, don't call that common, which God calls clean.
Romans 14:14
I know, being fully assured by the Lord Jesus, that there is nothing unclean of itself: it is only so to him that thinks it is unclean.
2 Corinthians 6:17
wherefore come out from among them, be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you,
Titus 1:15
to the pure all things are pure: but to corrupt infidels nothing is pure; whose very mind and conscience is polluted.