'Leopard' in the Bible

So like a lion from the thicket their enemies will kill them. Like a wolf from the desert they will destroy them. Like a leopard they will lie in wait outside their cities and totally destroy anyone who ventures out. For they have rebelled so much and done so many unfaithful things.

But there is little hope for you ever doing good, you who are so accustomed to doing evil. Can an Ethiopian change the color of his skin? Can a leopard remove its spots?