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.

29590 - (W) (1) From Qatadah, from Al-Hasan (they both said) (2): Regarding a man who killed intentionally (and the killer was imprisoned) (3) to be executed (4) for the murdered person, then a man came and killed the killer by mistake, (they both said) (5): His blood money is for the family of (the imprisoned) (6).

29591 - Ata' said: It is for the family of the first murdered person.

Hazrat Qatadah says that Hasan Basri stated: The blood money (diyat) belongs to the family of the murdered person.

A similar statement has also been narrated from Hammad as from Hasan Basri.