It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that on the day of Badr the Prophet (peace and blessings be upon him) had with him one hundred nadih (water-carrying camels) and some more camels, and he (peace and blessings be upon him) had two horses with him: Sayyiduna al-Miqdad bin al-Aswad (may Allah be pleased with him) used to ride one of them, and Sayyiduna Mus'ab bin Umayr (may Allah be pleased with him) and Sayyiduna Sahl bin Hunayf (may Allah be pleased with him) used to ride the other in turns. His (peace and blessings be upon him) Companions (may Allah be pleased with them) took turns riding these camels on the way, so the Messenger of Allah (peace and blessings be upon him), Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna Marthad bin Abi Marthad al-Ghanawi (may Allah be pleased with him), the ally of Sayyiduna Hamzah bin Abd al-Muttalib (may Allah be pleased with him), took turns riding one camel.
Hadith Referenceالمعجم الأوسط / باب الميم / 5438
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 12105»