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"They ask you (O Muhammad sal-Allaahu 'alayhe wa sallam) what is lawful for them (as food ), Say: "Lawful unto you are At-Tayyibat [all kind of Halal (lawful-good) foods which Allaah has made lawful (meat of slaughtered eatable animals, milk products, fats, vegetables and fruits, etc.)], And those beasts and birds of prey which you have trained as hounds, training and teaching them (to catch) in the manner as directed to you by Allaah; so eat of what they catch for you, but pronounce the Name of Allaah over it, and fear Allaah, Verily, Allaah is Swift in reckoning."" [Al-Maa'idah (5):4]

Narrated Al-Ahnaf bin Qais:

While I was going to help this man ('Ali Ibn Abi Talib), Abu Bakra met me and asked, "Where are you going?" I replied, "I am going to help that person." He said, "Go back for I have heard Allah's Apostle saying, 'When two Muslims fight (meet) each other with their swords, both the murderer as well as the murdered will go to the Hell-fire.' I said, 'O Allah's Apostle! It is all right for the murderer but what about the murdered one?' Allah's Apostle replied, "He surely had the intention to kill his companion." [The Book of Faith Volume 1, Book 2, Hadeeth 30]