You are neither hard-hearted nor of fierce character, nor one who shouts in the markets. You do not return evil for evil, but excuse and forgive. – Bukhari, Volume 6, Book 60, Number 362
Fight in the cause of Allah those who fight you, but do not transgress limits; for Allah loveth not transgressors. (2:190)
From Abu Bakr (ra):
“Stop, O people, that I may give you ten rules for your guidance in the battlefield. Do not commit treachery or deviate from the right path. You must not mutilate dead bodies. Neither kill a child, nor a woman, nor an aged man. Bring no harm to the trees, nor burn them with fire, especially those which are fruitful. Slay not any of the enemy’s flock, save for your food. You are likely to pass by people who have devoted their lives to monastic services; leave them alone”
Sunnisister on the never ending story.