Musnad Ahmad 30:2997

Yahya narrated to us, from Ibn Abi Dhi'b, who said: 'Ajlan, the freed slave of al-Musham'al, narrated to me, saying: I heard Abu Hurairah saying: The Messenger of Allah (peace and blessings of Allah be upon him) was asked about riding a sacrificial camel (*badana*). He said: "Ride it." He said: "It is a sacrificial camel." He said: "Ride it, woe to you."