'Leopard' in the Bible

And so a lion from the woods will put them to death, a wolf of the waste land will make them waste, a leopard will keep watch on their towns, and everyone who goes out from them will be food for the beasts; because of the great number of their sins and the increase of their wrongdoing.

Is it possible for the skin of the Ethiopian to be changed, or the markings on the leopard? Then it might be possible for you to do good, who have been trained to do evil.