Bukair bin Wahb, may Allah have mercy on him, says that once Hazrat Anas, may Allah be pleased with him, said to me: "I will narrate to you a hadith which I do not narrate to everyone, and it is this: Once the Prophet, peace and blessings be upon him, stood at the door of a house while we were inside it, and said: 'There will be leaders from among the Quraysh, and they will have rights over you, and you will have rights over them in the same way. When people ask them for mercy, they should show mercy; when they make a promise, they should fulfill it; when they judge, they should judge with justice. Whoever does not do so, upon him is the curse of Allah, the angels, and all people.'"