Musannaf Ibn Abi Shayba 13:1133

Abu Bakr narrated to us, he said: Rawh ibn ‘Ubadah narrated to us, from Ibn Abi Dhi’b, from Aban: That ‘Abd al-‘Aziz, Ibn Shihab, Abu Bakr ibn Muhammad, and Sa’d ibn Ibrahim used to pass judgment regarding his debt [being] for a fixed term.