Yonus bin 'Abdul A'la al-Sadfi يونس بن عبد الأعلى بن ميسرة الصدفي · The Book of Zakah

"No sadaqah is due on less than five Awaq, no Sadaqah is due on less than five Dhawd, no Sadaqah is due on less than five Awsuq."

"Sahl bin Abi Hathmah came to us when we were in the market and said: "The Messenger of Allah said: When you have estimated, take two-thirds (of the portion you have estimated as Zakah) and leave one-third, and if you do not take (two-thirds) or leave one-third. (One of the reporters) Shu 'bah doubted - leave one quarter."