with all this it is not desirable that all of the believers take the field . from within every group in their midst some shall refrain from going forth to war and shall devote themselves to acquiring a deeper knowledge of the faith. and teach their homecoming brethren so that these might guard themselves against evil.
وما كان المؤمنون لينفروا كافة فلولا نفر من كل فرقة منهم طائفة ليتفقهوا في الدين ولينذروا قومهم إذا رجعوا إليهم لعلهم يحذرون