if you encounter the disbelievers in a battle strikeoff their heads. take them as captives when they are defeated. then you may set them free as a favor to them with or without a ransom when the battle is over. this is the law. had god wanted he could have granted them victory but he wants to test you through each other. the deeds of those who are killed for the cause of god will never be without virtuous results.
فإذا لقيتم الذين كفروا فضرب الرقاب حتى إذا أثخنتموهم فشدوا الوثاق فإما منا بعد وإما فداء حتى تضع الحرب أوزارها ذلك ولو يشاء الله لانتصر منهم ولكن ليبلو بعضكم ببعض والذين قتلوا في سبيل الله فلن يضل أعمالهم