Musannaf Ibn Abi Shayba 13:2948

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Mis’ar narrated to us, from ‘Abd al-Malik ibn Maysarah, from Hawt al-‘Abdi, who said: ‘Abd Allah appointed me over the treasury (Bayt al-Mal). Whenever a counterfeit dirham passed by me, I would break it. And he would say: "Let not the Muslims be deceived by it."