According to Jewish dietary laws, all kinds of reptiles including amphibians are considered unclean animals.

In Abrahamic religions, a distinction between clean and unclean animals approximately falls according to whether the animal ruminates.

There is much debate over what is represented by the holy and what by the unclean animals.

"I will not go hungry, if the restaurants will stop trying to feed me unclean animals."

Show your boy a drunkard wallowing in the streets, like some unclean animal in the mire.

The pig is a suitable recipient because it is an unclean animal.

"All so-called unclean animals were originally sacred," Sir James wrote.

A voice from heaven told Peter to kill and eat, but since the sheet contained unclean animals, Peter declined.

Rats are seen as vicious, unclean, parasitic animals that steal food and spread disease.

As a True Believer, he could not even eat the flesh of the pig he had killed, since it was an unclean animal.