It is narrated from Wahb bin Kaysan that when allegiance was pledged to Abdullah bin Zubair (may Allah be pleased with him), a man from Iraq wrote a letter to him: "Peace be upon you! I praise Allah before you, besides whom there is no deity. To proceed! There are some signs of Allah's obedient servants and people of goodness by which they are recognized, and these things are seen in them: enjoining what is right, forbidding what is wrong, and obeying Allah. And know that the example of the Imam is like that of a marketplace, in which people come according to the kind of things that are in it. If he is a person of goodness, then good people come to him, and if he is wicked, then wicked and immoral people come to him with their wickedness and immorality."