Musannaf Ibn Abi Shayba 13:1691

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Isra’il narrated to us, from Jabir, from ‘Abd al-Rahman ibn al-Aswad, from ‘Aishah, that she granted a concession regarding the found property (luqatah) if it was a dirham.