Abu Dawud
Zakat
Book Number: 003 / Hadith Number: 1711
Narated By Ali ibn AbuTalib : Bilal ibn Yahya al-Absi said: Ali found a dinar and purchased some flour with it. The seller of the flour recognised him and returned the dinar to him. Ali took it, deducted two qirat (carat) from it, and purchased meat with it.