Hazrat Ziyad bin Muslim (may Allah have mercy on him) said: A man came from India to Aden under protection. Then a Muslim killed him in place of his brother. So Umar bin Abdul Aziz (may Allah have mercy on him) wrote: Do not kill him. Take blood money from him. And send it to the heirs of the murdered. And imprison the killer.
Hadith Referenceسنن سعید بن منصور / كتاب الجهاد / 4002
Hadith Takhrij«أخرجه سعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 2826، والبيهقي فى«سننه الكبير» برقم: 18242، وابن أبى شيبة فى «مصنفه» برقم: 28606، 28607، 34110، 34112»