Musnad Ahmad 5:331

Abdullah narrated to us, Abu Bakr al-Bahili Muhammad ibn Amr ibn al-Abbas narrated to me, Abd al-Wahhab—meaning al-Thaqafi—narrated to us, Ayyub narrated to us, from Abd al-Karim and Ibn Abi Najih, from Mujahid, from Abd al-Rahman ibn Abi Layla, from Ali: "That the Prophet, peace and blessings of Allah be upon him, sent with him his sacrificial animals (hady), and he commanded him to give away their meat, their skins, and their coverings (jull) as charity."