Musannaf Ibn Abi Shayba 18:430

Abu Bakr narrated to us, he said: Muhammad ibn Bakr narrated to us, from Ibn Jurayj, he said: Abd al-Aziz ibn Umar informed me that the commanders of the armies and the people of opinion among them gathered before Umar ibn Abd al-Aziz regarding the shoulder if it is broken and then set, without any crookedness, then in it is forty dinars.