I asked Jabir bin `Abdallah about riding on the sacrificial camels. He said I heard The Messenger of Allah (SWAS) saying ride on them gently when you have nothing else till you find a mount.
Sunan Abi Dawud Book 11, Hadith 41
← Previous Hadith The Messenger of Allah (SWAS)saw a man driving the sacrificial camel. He said ride on it. He said this is a sacrificial camel. He again said ride on it, bother you, either the second or the third time he spoke.

Sunan Abi Dawud Book 11, Hadith 40 Next Hadith → The Messenger of Allah (ﷺ) sent sacrificial camels with him (as offering to the Ka'bah). He then said: If any one of them becomes fatigued, slaughter it, dip its shoes in its blood, and leave it for the people (to eat).

Sunan Abi Dawud Book 11, Hadith 42