Hadith 2702
Muhammad bin Hamzah bin Amr Aslami said, and his father, Sayyiduna Hamzah (may Allah be pleased with him), was among the companions of the Prophet (peace and blessings be upon him). He said: I heard my father say, he used to say: The Messenger of Allah (peace and blessings be upon him) said: "There is a devil on every camel's hump, so when you mount a camel, mention the name of Allah (i.e., say Bismillah), and do not be negligent in your needs."