al-Qasim bin Mukhaymara القاسم بن مخيمرة · The Book of Zakah

"The Messenger of Allah enjoined Sadaqatul Fitr upon male and female, free and slave; a Sa of dates or a Sa of barley." He said: "The people considered that equivalent to half a Sa of wheat."

"The Messenger of Allah enjoined the Zakah of Ramadan on everyone, young and old, free and slave, male and female, a Sa of dates or a Sa of barley."