it was not necessary for the believers to go forth all together but why did not a party of them go forth that they may grow in religious understanding and that they may warn their people when they return to them so that they may avoid ?
وما كان المؤمنون لينفروا كافة فلولا نفر من كل فرقة منهم طائفة ليتفقهوا في الدين ولينذروا قومهم إذا رجعوا إليهم لعلهم يحذرون