al-Qasim bin Malik al-Mzny القاسم بن مالك المزني أبو جعفر الكوفي · The Book of Zakah

" At the time of the Messenger of Allah we did not give anything except a Sa' of dates, or a Sa' of barley, or a Sa' of raisins, or a Sa' of flour, or a Sa' of cottage cheese, or a Sa' of rye." Then (one of the narrators) Sufyan was uncertain and said: "Flour or rye. "