it is not for the believers to go forth totally but why should not a party of every section of them go forth to become learned in religion and to warn their people when they return to them that haply they may beware?
وما كان المؤمنون لينفروا كافة فلولا نفر من كل فرقة منهم طائفة ليتفقهوا في الدين ولينذروا قومهم إذا رجعوا إليهم لعلهم يحذرون