From Surah AN-NISA (Women) of HOLY QURAN (English Translation – Pickthal),
Let those fight in the way of Allah who sell the life of this world for the other. Whoso fighteth in the way of Allah, be he slain or be he victorious, on him We shall bestow a vast reward.
How should ye not fight for the cause of Allah and of the feeble among men and of the women and the children who are crying: Our Lord! Bring us forth from out this town of which the people are oppressors! Oh, give us from thy presence some protecting friend! Oh, give us from Thy presence some defender!
Those who believe do battle for the cause of Allah; and those who disbelieve do battle for the cause of idols. So fight the minions of the devil. Lo! the devil’s strategy is ever weak.
Hast thou not seen those unto whom it was said: Withhold your hands, establish worship and pay the poordue, but when fighting was prescribed for them behold! a party of them fear mankind even as their fear of Allah or with greater fear, and say: Our Lord! Why hast Thou ordained fighting for us? If only Thou wouldst give us respite yet a while! Say (unto them, O Muhammad(pbuh)): The comfort of this world is scant; the Hereafter will be better for him who wardeth off (evil); and ye will not be wronged the down upon a date-stone.
Wheresoever ye may be, death will overtake you, even though ye were in lofty towers. Yet if a happy thing befalleth them they say: This is from Allah; and if an evil thing befalleth them they say: This is of thy doing (O Muhammad(pbuh)). Say (unto them): All is from Allah. What is amiss with these people that they come not nigh to understand a happening?
From Surah AL-TAWBA (Repentance, Dispensation) of HOLY QURAN (English Translation – Pickthal),
Will ye not fight a folk who broke their solemn pledges, and purposed to drive out the messenger and did attack you first? What! Fear ye them? Now Allah hath more right that ye should fear Him, if ye are believers
Fight them! Allah will chastise them at your hands, and He will lay them low and give you victory over them, and He will heal the breasts of folk who are believers.
O ye who believe! What aileth you that when it is said unto you: Go forth in the way of Allah, ye are bowed down to the ground with heaviness. Take ye pleasure in the life of the world rather than in the Hereafter? The comfort of the life of the world is but little in the Hereafter.
If ye go not forth He will afflict you with a painful doom, and will choose instead of you a folk other than you. Ye cannot harm Him at all. Allah is Able to do all things.
Lo! Allah hath bought from the believers their lives and their wealth because the Garden will be theirs: they shall fight in the way of Allah and shall slay and be slain. It is a promise which is binding on Him in the Torah and the Gospel and the Qur’an. Who fulfilleth His covenant better than Allah? Rejoice then in your bargain that ye have made, for that is the supreme triumph.