Musannaf Ibn Abi Shayba 18:397

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from Khalid al-Hadhdha’, from ‘Amr ibn Hazm, from Jabir ibn Zayd, from Ibn ‘Abbas regarding the fingernail when it is torn off: "Five [camels as] the blood money of a finger."