Sahih Muslim — The Book on Government — Hadith No: 4859
Translation
It has been narrated on the authority of Abu Huraira that the Messenger of Allah (may peace upon him) said:Allah has undertaken to look after the affairs of one who goes out to fight in His way believing in Him and affirming the truth of His Apostles. He is committed to His care that Re will either admit him to Paradise or bring him back to his home from where he set out with a reward or (his share of) booty. By the Being in Whose Hand is the life of Muhammad. If a person gets wounded in the way of Allah, he will come on the Day of Judgment with his wound in the same condition as it was when it was first inflicted; its colour being the colour of blood but its smell will be the smell of musk. By, the Being in Whose Hand is Muhammad's life, if it were not to be too hard upon the Muslime. I would not lag behind any expedition which is going to fight in the cause of Allah. But I do not have abundant means to provide them (the Mujahids) with riding beasts, nor have they (i. e. all of them) abundant means (to provide themselves with all the means of Jihad) so that they could he left behind. By the Being in Whose Hand is Muhammad's life, I love to fight in the way of Allah and be killed, to fight and again be killed and to fight again and be killed