Messenger of Allah, appoint me the leader of the tribe in prayer. He said: You are their leader, but you should follow on who is the weakest of them: and appoint a mu'adhdhin who does not charge for the calling of adhan. (Using translation from Abū Dāʾūd 531)  

قُلْتُ يَا رَسُولَ اللهِ اجْعَلْنِي إِمَامَ قَوْمِي قَالَ «أَنْتَ إِمَامُهُمْ وَاقْتَدِ بِأَضْعَفِهِمْ وَاتَّخِذْ مُؤَذِّنًا لَا يَأْخُذُ عَلَى أَذَانِهِ أَجْرًا»