Musannaf Ibn Abi Shayba 18:294

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Sufyan narrated to us, from Firas, from al-Sha’bi, from Masruq, regarding the one-eyed man whose sound eye is gouged out: He said: "There is half the blood money in it, for he is the one killed by Allah."