Musnad Ahmad 28:535

'Abd al-Wahhab 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) said: "Regarding the *Mawadi'* (wounds that expose the bone of the head or face), there are five [camels] for each one. And the fingers are equal; for each one of them, there are ten [camels]."