It is narrated from Sa'id bin al-Musayyib (may Allah have mercy on him) that 'Umar bin al-Khattab (may Allah be pleased with him) ruled that for the thumb, the compensation is fifteen (camels), for the finger next to the thumb (the index finger), ten, for the middle finger, ten, for the finger next to the little finger, nine, and for the little finger, six (camels as blood money).
Hadith Referenceمسند الإمام الشافعي / كتاب القتل والقصاص والديات والقسامة / 1661
Hadith Takhrijواخرجه البيهقي : 93/8 - وفي المعرفة السنن والآثار له (4916)۔