Of Fighting for the Faith.
We came out with the Prophet, with a part of the army, and a man passed by a cavern in which was water and verdure, and he said in his heart, “I shall stay here, and retire from the world.” Then he asked the Prophet’s permission to live in the cavern; but he said, “Verily I have not been sent on the Jewish religion, nor the Christian, to quit the delights of society; but I have been sent on the religion inclining to truth, and that which is easy, wherein is no difficulty or austerity. I swear by God, in whose hand is my life, that marching about morning and evening to fight for religion is better than the world and everything that is in it: and verily the standing of one of you in the line of battle is better than supererogatory prayers performed in your house for sixty years.”
When the Prophet sent an army out to fight, he would say, March in the name of God and by His aid and on the religion of the Messenger of God. Kill not the old man who cannot fight, nor young children nor women; and steal not the spoils of war, but put your spoils together; and quarrel not amongst yourselves, but be good to one another, for God loveth the doer of good.
Of Judgments.
The first judgment that God will pass on man at the Day of Resurrection will be for murder.
Whosoever throweth himself from the top of a mountain and killeth himself is in Hell Fire for ever; and whosoever killeth himself with iron, his iron shall be in his hand, and he will stab his belly with it in Hell Fire everlastingly.