It is narrated from Sayyiduna Abu Las al-Khuza'i (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) gave us some weak camels from the camels of charity (sadaqah) for Hajj. We said: "O Messenger of Allah! We do not think these can carry us." He (peace and blessings be upon him) said: "On the hump of every camel there is a devil, so when you mount them, mention the name of Allah as you have been commanded, then put them to work for yourselves, for in reality it is Allah who carries." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs did not record it. It also has a sahih supporting narration (shahid).