Umm al-Husayn (may Allah be pleased with her) says: I performed the Farewell Hajj with the Prophet (peace and blessings be upon him), and I saw Bilal and Usamah (may Allah be pleased with them both): one of them was holding the reins of his (peace and blessings be upon him) she-camel, and the other was raising his garment and shielding him (peace and blessings be upon him) from the heat, until he (peace and blessings be upon him) had stoned Jamrat al-Aqabah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9190