Leviticus 11:43
Do not defile yourselves by any crawling creature; do not become unclean or defiled by them.

Leviticus 20:25
You are therefore to distinguish between clean and unclean animals and birds. Do not become contaminated by any animal or bird, or by anything that crawls on the ground; I have set these apart as unclean for you.

Isaiah 65:4
sitting among the graves, spending nights in secret places, eating the meat of pigs and polluted broth from their bowls.

Ezekiel 4:14
"Ah, Lord GOD, " I said, "I have never defiled myself. From my youth until now I have not eaten anything found dead or mauled by wild beasts. No unclean meat has ever entered my mouth."

Acts 10:12-14
It contained all kinds of four-footed animals and reptiles of the earth, as well as birds of the air. . . .

Romans 14:14
I am convinced and fully persuaded in the Lord Jesus that nothing is unclean in itself. But if anyone regards something as unclean, then for him it is unclean.

1 Corinthians 10:28
But if someone tells you, "This food was offered to idols, " then do not eat it, for the sake of the one who told you and for the sake of conscience--

Titus 1:15
To the pure, all things are pure; but to the defiled and unbelieving, nothing is pure. Indeed, both their minds and their consciences are defiled.