Sunan Abu Dawud
1715
Sahih+3

Narrated Ali ibn Abu Talib: 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

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid