Musannaf Ibn Abi Shayba 18:225

Abu Bakr narrated to us, he said: Muhammad ibn Bakr narrated to us, from Ibn Jurayj, from Ibn Abi Najih, from Mujahid, who said: If the fingers are cut off, then the blood money (diyah) is due. And if the palm is cut off, then fifty camels are due.