Uthman ibn 'Affaan · The Book of Fighting [The Prohibition of Bloodshed]

"The Messenger of Allah used to stress charity in his sermons, and prohibit mutilation."

The Messenger of Allah said: "It is not permissible to shed the blood of a Muslim except in three cases: An adulterer who had been married, who should be stoned to death; a man who killed another man intentionally, who should be killed; and a man who left Islam and waged war against Allah, the Might and Sublime, and His Messenger, who should be killed, or crucified, or banished from the land."