When the verse "If there are twenty steadfast among you, they will overcome two hundred" [Anfal 8:65] was revealed, it weighed heavily on the Muslims, since it made it obligatory for them that no single man flee from ten. Then relief came, and Allah said, "Now Allah has lightened it for you, knowing that there is weakness among you. So if there are a hundred steadfast among you, they will overcome two hundred" [Anfal 8:66].He said, "When Allah lightened their obligation regarding the numbers, He also reduced what was required of their steadfastness in proportion to the relief He had granted them."
لما نزلت{إن يكن منكم عشرون صبرون يغلبوا مائتين}، شق ذلك على المسلمين حين فرض عليهم أن لا يفر واحد من عشرة، فجاء التخفيف، فقال: {الآن خفف الله عنكم وعلم أن فيكم ضعفا فإن يكن منكم مائة صابرة يغلبوا مائتين} قال: فلما خفف الله عنهم من العدة، نقص من الصبر بقدر ما خفف عنهم.