Rabi'ah (may Allah have mercy on him) said that he asked Ibn al-Musayyib (may Allah have mercy on him): What is the blood money for a woman's finger? He said: Ten camels. He asked: For two fingers? He said: Twenty. He asked: For three? He said: Thirty. He asked: For four? He said: Twenty. Rabi'ah (may Allah have mercy on him) said: When the wound grows greater and the suffering more severe, the blood money becomes less? He asked: Are you an Iraqi? Rabi'ah (may Allah have mercy on him) said: A scholar seeking certainty, or an ignorant man seeking to learn. He said: O my nephew, this is the Sunnah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16311