Ibn Shihab al-Zuhri (may Allah have mercy on him) says: I read in the letter which the Prophet (peace and blessings be upon him) wrote for Amr bin Hazm (may Allah be pleased with him): "The blood money for one ear is 50 camels."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16220
Zayd bin Aslam (may Allah have mercy on him) says: The Sunnah has been established concerning the parts of the human body. Then he mentioned a long hadith in which there was also: "For the ears there is also blood money."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16221
It is narrated from Tawus and Ikrimah (may Allah have mercy on them both) that Sayyiduna Umar (may Allah be pleased with him) ruled half the blood money for an ear, and Ma'mar (may Allah have mercy on him) says that Sayyiduna Abu Bakr (may Allah be pleased with him) had ruled 15 camels.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16222
Sayyiduna Ali (may Allah be pleased with him) ruled half of the blood money for a life for an ear.
Sayyiduna Ibn Mas'ud (may Allah be pleased with him) says: For an ear, when it is cut off from the root, there is half the blood money, and in this half too the camels will be of five categories; whatever is less than that will be by the same proportion.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16223