'Clean and the Unclean' in the Bible

You must distinguish between the holy and the common, and the clean and the unclean,

Indeed, you may eat it as the gazelle and deer are eaten; both the clean and the unclean may eat it.

Everything is the same for everyone: there is one fate for the righteous and the wicked, for the good and the bad, for the clean and the unclean, for the one who sacrifices and the one who does not sacrifice. As it is for the good, so it is for the sinner; as for the one who takes an oath, so for the one who fears an oath.

Her priests do violence to My instruction and profane My holy things. They make no distinction between the holy and the common, and they do not explain the difference between the clean and the unclean. They disregard My Sabbaths, and I am profaned among them.

They must teach My people the difference between the holy and the common, and explain to them the difference between the clean and the unclean.