Musnad Abu Ya'la al-Mawsili 42:312

Zuhayr narrated to us, Sa'id ibn 'Amir narrated to us, from Sa'id ibn Abi 'Arubah, from Matar, from Ibn Sirin, from Dhakwan Abu Salih—and he praised him well—from Jabir, Abu Hurayrah, and Abu Sa'id al-Khudri, that they forbade *al-sarf* (the exchange of gold and silver). And two men among them attributed that to the Messenger of Allah, may Allah bless him and grant him peace.