Leviticus 11:47

Then Noah built an altar to Yahweh and took of every clean animal and of every clean bird and offered burnt offerings on the altar.

and so as to separate between the holy and the profane, and between the unclean and the clean,

‘You are therefore to separate between the clean animal and the unclean, and between the unclean bird and the clean; and you shall not make yourselves detestable by animal or by bird or by anything that creeps on the ground, which I have separated for you as unclean.

But Daniel set in his heart that he would not defile himself with the king’s choice food or with the wine which he drank; so he sought permission from the commander of the officials that he might not defile himself.

since they relate only to food and drink and various washings, requirements for the body imposed until a time of reformation.