Musnad Ahmad 643:4

'Affan narrated to us, Shu'bah narrated to us, he said: 'Abdullah bin Abi as-Safar narrated to me, he said: I heard ash-Sha'bi, from 'Urwah bin al-Mudarris bin Aws bin Harithah bin Lam, he said: I came to the Prophet, peace and blessings of Allah be upon him, while he was at Jam' (Muzdalifah), and he mentioned the like of the hadith of Rawh.