Ta’us, on the authority of Ibn ‘Abbas, reported God’s Messenger as saying, “If anyone is killed in error when people are throwing stones, or by beating with whips, or striking with a stick, it is accidental and the compensation for accidental death is due.* But if anyone kills someone deliberately retaliation is due, and if anyone tries to prevent it God’s curse and anger will rest on him, and neither supererogatory nor obligatory acts will be accepted from him.”
Abu Dawud and Nasa’i transmitted it.
*These are instances in which the actual person who killed him is not clearly known, or where there was no intention to kill.
Abud Darda’ told that he heard God’s Messenger say, “No one will suffer any bodily injury and forgive it* without God raising him a degree for it and removing a sin from him.”
Abu Shuraih al-Khuza'i told that he heard God's Messenger say, “If a relative of anyone is killed, or if he suffers khabal, which means a wound, he may choose one of three things, but if he wants anything more* you must restrain him. He may retaliate, or forgive, or receive compensation; but if he accepts one of these and afterwards asks something more, he will go to hell for ever and ever.”