Musannaf Ibn Abi Shaybah

Ibrahim and Hasan Basri said: Regarding a man who was deliberately killed, and the killer was imprisoned so that he could be killed in retribution for the murdered person. Then a man came and mistakenly killed this killer, so his blood money will be given to the family of the prisoner, and Hazrat Ata said: The family of the first murdered person will receive his blood money.