Sahih Bukhari Volume 2, Book 26, Hadith Number 774.

Narated By ‘Ali : The Prophet sent me to supervise the (slaughtering of) Budn (Hadi camels) and ordered me to distribute their meat, and then he ordered me to distribute their covering sheets and skins. ‘All added, “The Prophet ordered me to supervise the slaughtering (of the Budn) and not to give anything (of their bodies) to the butcher as wages for slaughtering.”