Ali ibn al-Hasan ibn Faddal, from Abbad ibn Yaqub, from Ibrahim ibn Abi Yahya, from Abu Abdillah Imam Ja’far عليه السلام from his father, Imam al-Baqir عليه السلام, peace be upon them both: Imam عليه السلام said: “The first one who made two mudds (muddayn) of Zakat equal to one sa’ of dates was Uthman.”