Ibn Abbas (may Allah be pleased with them both) used to say: "For the fingers, ten camels each." So Marwan sent a message to him and reminded him of the ruling of Sayyiduna Umar (may Allah be pleased with him). Ibn Abbas (may Allah be pleased with them both) replied: May Allah have mercy on Umar (may Allah be pleased with him); is the saying of the Prophet (peace and blessings be upon him) to be followed, or that of Umar (may Allah be pleased with him)?
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16287