Ibn al-Musayyib (may Allah have mercy on him) said: Sayyiduna Umar (may Allah be pleased with him) ruled blood money of 15 camels for the thumb, 10 for the index finger, 10 for the middle finger, 9 for the one next to the little finger, and 6 camels for the little finger.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16285