One of the earliest references to toads as being linked to the forces of darkness was when Zoroaster said in 600 BC that all toads should be killed. In Europe in the Middle Ages, the toad was associated with the Devil, whose coat-of-arms has three toads on it. It was thought that the toad could poison people. It was also thought that it was the witch's familiar and thus had magical powers. In France it was thought that witches could be found because they were marked by a toad's foot somewhere on their body. In Dorset it was believed that if one found a toad in the house it should be removed without harming it or the householder would face the wrath of the witch whose familiar it was. In some areas, the finding of a toad in a house was seen as evidence that a witch was present. The saliva of the toad was thought to be poisonous. It was believed that it could spit or vomit poisonous fire. It was thought unlucky for a toad to jump over one's foot and in some regions, this was a sign of death. Toads were associated with devils and demons and in "Paradise Lost". John Milton showed Satan as a toad when he poured poison into Eve's ear. The First Witch in Shakespeare's Macbeth gave instructions on using a toad in the making of spells: