Musnad Ahmad 262:6

'Attab narrated to us, he said: 'Abdullah and 'Ali ibn Ishaq narrated to us, they said: 'Abdullah—meaning Ibn al-Mubarak—informed us, he said: Usamah ibn Zayd informed us, he said: Muhammad ibn Hamzah informed me that he heard his father saying: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Upon the back of every camel is a devil. So when you ride them, mention the name of Allah, the Almighty and Majestic, then do not fall short in [attaining] your needs."