Musnad Ahmad 30:3435

Yazid narrated to us, Ibn Abi Dhi'b informed us, from 'Ajlan, from Abu Hurayrah, that the Prophet, 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."