Musannaf Ibn Abi Shayba 18:981

Abu Bakr narrated to us, he said: Muhammad bin Bakr narrated to us, from Ibn Jurayj, who said: I said to 'Ata': "A man inflicts a wound upon himself by mistake; is there any blood money (diya) upon him?" He said: "His paternal relatives (aqilah) shall pay his blood money."