Musannaf Ibn Abi Shayba 18:184

Abu Bakr narrated to us, he said: Muhammad bin Bakr narrated to us, from Ibn Jurayj, he said: Abd al-Aziz bin Umar informed me that the commanders of the armies gathered for Umar bin Abd al-Aziz in al-Sahr. When a man would not turn except for what the man inclined [towards], fifty dinars.