O you who believe, obey God, and obey the Messenger and those in authority among you, that is, rulers, when they command you to obey God and His Messenger. If you should quarrel, disagree, about anything, refer it to God, that is, to His Book, and the Messenger, while he lives, and thereafter [refer] to his Sunna: in other words examine these [disputes] with reference to these two [sources], if you believe in God and the Last Day; that, reference to the two [sources], is better, for you than quarrelling or [adhering to] personal opinions, and more excellent in interpretation, in the end.