It was narrated from ash-Sha"bi that al-Fadl told him that

he was seated behind the Prophet (ﷺ) on his mount on the way from "Arafah, and his mount kept going and did not stop until he reached Muzdalifah. He [the narrator] said: And ash-Sha"bi told me that Usamah told him that he was seated behind the Prophet (ﷺ) on his mount from Muzdalifah, and his mount kept going and did not stop until he stoned the Jamrah.