Hadith.2217 - "Hajj performed while riding is better than performing it on foot, because the Messenger of Allah (swt), peace and blessings be upon him and his family, performed Hajj while riding."
Al-Kāfi #1710“Abu ‘Abd Allah (a.s.), was asked about traveling for al-Hajj if on foot was more virtuous or riding. He (the Imam) said, ‘Riding is more...