Al-Matalib al-'Aliyah 1892 — Blood money

Sa'id bin al-Musayyib narrates that Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) used to set for the thumb and the finger next to it (the index finger) half the blood-money of the whole hand; he would set fifteen camels as blood-money for the thumb, ten for the finger next to it, ten for the middle finger, nine for the finger adjoining it, and six for the smallest finger. This continued until the caliphate of Sayyiduna Uthman bin Affan (may Allah be pleased with him) came, and he obtained the document that the Messenger of Allah (peace and blessings be upon him) had written for Sayyiduna Amr bin Hazm (may Allah be pleased with him), in which was written: "And for (all the) fingers (of the hand), ten (camels as blood-money) for each one." So Sayyiduna Uthman (may Allah be pleased with him) fixed the blood-money of every finger at ten camels each. Through another chain it is narrated from Sa'id bin al-Musayyib himself that Sayyiduna Umar (may Allah be pleased with him) ruled half the blood-money of the hand for the thumb and the finger next to it, ten for the middle finger, nine for the one next to it, and six camels for the little finger, until a document was found with the family of Amr bin Hazm which they said was the decree of the Messenger of Allah (peace and blessings be upon him); in it was written: "And for every finger (the blood-money) is ten (camels)." Sa'id bin al-Musayyib said: Then this ruling was settled equally for all the fingers, that is, ten camels each.
This chain is sahih (authentic) and connected up to Sa'id bin al-Musayyib, and if he heard it directly from Sayyiduna Umar (may Allah be pleased with him), then this report is established (at the highest level).