Muhammad bin Ibrahim bin al-Harith محمد بن إبراهيم بن الحارث · The Chapters Regarding Zakat

that the Messenger of Allah enjoined Sadaqatul-Fitr, one Sa of dates, one Sa of barley, or one Sa of Sult (a kind of barley without skin on it, resembling wheat).

that Ala bin Hadrami said: “The Messenger of Allah sent me to Bahrain or Hajar. I used to go to a garden that was shared by some brothers, one of whom had become Muslim. I would take the Ushr (one-tenth of the harvest) from the Muslim, and Kharaj from the Mushrik.”