Zakat (Kitab Al-Zakat)
Dawud :: Book 9 : Hadith 1616
Narrated Tha'labah ibn Su'ayr:
The Apostle of Allah (peace_be_upon_him) stood and gave a sermon; he commanded to give sadaqah, at the end of Ramadan when the fasting is closed, one sa' of dried dates or of barley payable by every person. The narrator Ali added in his version: "or one sa' of wheat to be taken from every two." Both the chains of narrators are then agreed upon the version: "payable by young and old, freeman and slave."