"The punishment of those who wage war against Allah and His Messenger, and strive with might and main for mischief through the land is: execution, or crucifixion, or the cutting off of hands and feet from opposite sides, or exile from the land: that is their disgrace in this world, and a heavy punishment is theirs in the Hereafter;" - Quran 5:33 (read more)

"Narrated Anas bin Malik: While we were sitting with the Prophet in the mosque, a man came riding on a camel. He made his camel kneel down in the mosque, tied its foreleg and then said: "Who amongst you is Muhammad?" At that time the Prophet was sitting amongst us (his companions) leaning on his arm. We replied, "This white man reclining on his arm." They then addressed him" - Sahih Bukhari 1:3:63 (read more)

"If war is waged anywhere to achieve this goal, namely to free the occupied lands of the laws and the tyranny of disbelievers, it is undoubtedly a case of Jihad for the sake of Allah. It thus needs to be financed from the money of Zakah, the amount of which is to be decided based on the total sum of the charity, the requirements of Jihad as well as the degree of the need of other potential recipients of charity." - Yusuf al-Qaradawi