Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: On the Day of Arafah the Messenger of Allah (peace and blessings be upon him) had Usamah bin Zayd (may Allah be pleased with him) ride behind him until he reached Muzdalifah; then he had al-Fadl (may Allah be pleased with him) ride behind him until he reached Jamrat al-Aqabah, and he (peace and blessings be upon him) continued reciting the talbiyah until he stoned Jamrat al-Aqabah.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12644