Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: There was retribution (qisas) among the Children of Israel, but there was no blood money (diyah) among them. So Allah, the Mighty and Majestic, said for this Ummah: "Prescribed for you is retribution in the case of murder: the free for the free..." until the verse reached: "But if any remission is made by his brother..." The narrator stated: His forgiving means his accepting blood money. Thus, following and demanding it in a good manner is prescribed. He said: He will demand it from him in a good manner and will enjoin kindness upon him. This addition is narrated from Sufyan: "This is a concession and mercy from your Lord." What is meant is: accepting blood money for intentional murder.