O you who believe, retaliation is prescribed for you in the matter of the slain: the free for the free, and the slave for the slave, and the female for the female. But if remission is made to one by his (aggrieved) brother, prosecution (for blood-wit) should be according to usage, and payment to him in a good manner. This is an alleviation from your Lord and a mercy. Whoever exceeds the limit after this, will have a painful chastisement.