Mishkat al-Masabih 1815

Ibn ‘Umar said God’s messenger prescribed as the zakat payable by slave and freeman, male and female, young and old among the Muslims on breaking the fast of Ramadan a sa'* of dried dates or a sa' of barley, and gave command that this should be paid before the people went out to prayer. (Bukhari and Muslim.) * The Hijazi sa' is described as a measure equivalent to four mudds, the mudd being the amount a man with average size hands can hold with both hands extended.