Luke 11:41

But give as alms the things within; and, behold, all things are clean to you.

Acts 10:15-16

And a voice came to him again, a second time, "What God cleansed, count not common."

Acts 10:28

and he says to them, "Ye know that it is unlawful for a Jew to join himself with, or come to, one of another race; and yet God showed me that I should call no man common or unclean.

Romans 14:14

I know, and have been persuaded in the Lord Jesus, that nothing is unclean of itself: except that to him who accounts anything to be unclean, to him it is unclean.

Romans 14:20

Do not, for the sake of food, overthrow the work of God. All things, indeed, are clean; but it is evil to him who eats with offense.

2 Corinthians 6:17

Wherefore, "Come ye out from among them, and be ye separate," saith the Lord, "and touch no unclean thing, and I will receive you;

Titus 1:15

To the pure all things are pure; but to the defiled and unbelieving nothing is pure; but both their mind and their conscience have become 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 as alms the things within; and, behold, all things are clean to you.
Acts 10:15
And a voice came to him again, a second time, "What God cleansed, count not common."
Romans 14:14
I know, and have been persuaded in the Lord Jesus, that nothing is unclean of itself: except that to him who accounts anything to be unclean, to him it is unclean.
2 Corinthians 6:17
Wherefore, "Come ye out from among them, and be ye separate," saith the Lord, "and touch no unclean thing, and I will receive you;
Titus 1:15
To the pure all things are pure; but to the defiled and unbelieving nothing is pure; but both their mind and their conscience have become defiled.