Musannaf Ibn Abi Shayba 20:20

Abu Bakr narrated to us, he said: Muhammad ibn Bishr narrated to us, from Sa'id, from Matar, from 'Amr ibn Shu'ayb, from his father, from his grandfather, that the Prophet (peace and blessings of Allah be upon him) decreed for the fingers ten [camels] for each.