there has already been a sign for you in the two armies that met one was fighting in the cause of allah and as for the other were disbelievers. they saw them with their own eyes twice their number . and allah supports with his victory whom he pleases. verily in this is a lesson for those who understand. . 
قد كان لكم آية في فئتين التقتا فئة تقاتل في سبيل الله وأخرى كافرة يرونهم مثليهم رأي العين والله يؤيد بنصره من يشاء إن في ذلك لعبرة لأولي الأبصار