Yahya bin Abi Kathir (may Allah have mercy on him) says: Yahya bin Sa'id (may Allah have mercy on him) wrote and sent me the copy that was with Abu Bakr bin Muhammad bin Amr bin Hazm, which the Prophet (peace and blessings be upon him) had written and given to Amr bin Hazm (may Allah be pleased with him). In it was: "When the nose is cut off from the root, there is the full blood money for it; for an eye half the blood money; for the extremely deep head wound and for the abdominal wound that reaches the intestines, one third of the blood money for a life; for the wound that exposes the bone and for a tooth, five camels each; and all the fingers are equal, for each finger 10 camels."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16216
It is narrated from Sayyiduna Ali (may Allah be pleased with him): "For an abdominal wound and for the head wound that reaches the brain, there is one third of the blood money for a life."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16217
Sa'id bin al-Musayyib (may Allah have mercy on him) says: A man shot another with an arrow, which struck him in the abdomen and came out of the other side, so Sayyiduna Abu Bakr (may Allah be pleased with him) ruled two thirds of the blood money for a life.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16218