Musannaf Ibn Abi Shaybah 35666 — A man who enters under safe conduct

It is narrated from Ziyad bin Muslim that a man from the people of India came to Aden under a grant of security, and a Muslim man killed him in retaliation for his brother. A letter was written about this to Umar bin Abd al-Aziz, and he wrote back: "Do not kill him. Take the blood money (diyah) from him and send it to the heirs of the slain man." And he ordered that the killer be imprisoned.