Sa’sa’ah bin Sawhan said to Abu Zaid: I do not love your mother more than you, while you love my mother more than me. There are two qualities I advise you with, so remember them from me: Have sincere friendship with a believer, and behave well with a wicked person, because a wicked person will accept your words through good manners, and a believer has the right over you that you have sincere friendship with him.