"Until, when he reached the setting of the sun, he found it set in a spring of murky water: Near it he found a People: We said: “O Zul-qarnain! (thou hast authority,) either to punish them, or to treat them with kindness." - Quran 18:86 (read more)

"Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The last hour would not come unless the Muslims will fight against the Jews and the Muslims would kill them until the Jews would hide themselves behind a stone or a tree and a stone or a tree would say: Muslim, or the servant of Allah, there is a Jew behind me; come and kill him; but the tree Gharqad would not say, for it is the tree of the Jews." - Sahih Muslim 41:6985 (read more)

"If he beats her, the beatings should not be hard, so that they do not leave a mark. He can beat her with a short rod. He must avoid beating her in the face or in places in the head where it hurts. The beatings should be on the body and should not come one right after the other. These are all choices made during the process, but beatings are allowed only as a last resort. The honoring of the wife in Islam is also evident in the fact that the punishment of beating is permissible in one case only: when she refuses to sleep with him." - Sa’d Arafat