Instructions for Malik al-Ashtar upon his appointment as the governor of Egypt

When you lead the prayers for the people it should be neither (too long as to be) boring nor (too short as to be) wasteful, because among the people there are the sick as well as those who have needs of their own. When the Messenger of Allāh صلى الله عليه وعلى آله وسلم sent me to Yemen I enquired how I should offer prayers with them and he replied, “Say the prayers as the weakest of them would say, and be considerate to the believers.”