Musnad Ahmad 937:244

'Abd al-Rahman ibn Mahdi narrated to us, Sufyan narrated to us, from al-Mughirah ibn al-Nu'man, from 'Abdullah ibn Yazid ibn al-Aqna', from al-Ahnaf ibn Qays, who said: While I was in a circle, Abu Dharr came, and they began to flee from him. I said: "Why do the people flee from you?" He said: "I forbid them from the treasure (kanz) that the Messenger of Allah, peace and blessings of Allah be upon him, used to forbid them from."