Sayyiduna Ibn Abbas (may Allah be pleased with them both) says: Among the Children of Israel, the law of retribution (qisas) was prescribed, and there was no law of blood money (diyah) among them. So Allah said to this Ummah: "Retribution has been prescribed for you regarding those killed: the free for the free, the slave for the slave, the woman for the woman, and if someone is pardoned by his brother..." Here, pardon means that the other person agrees to accept blood money in a case of intentional murder. Allah Almighty says: "This is a concession from your Lord." That is, this is a concession compared to the law that was imposed on those before you. So Allah Almighty has granted you a concession in this regard. This concession has come to you from your Lord. You may accept blood money in a case of intentional murder. (He said) So follow it in a good manner, that is, pursue it in a proper way and pay it with kindness.