Sayyiduna Jabir (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him), during the Farewell Hajj, performed the tawaf of the House and of al-Safa and al-Marwah on his she-camel, so that the people could see him (peace and blessings be upon him) and ask him questions, because the people had crowded around him (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9377