"I heard As-Sa'ib bin Yazid say: 'During the time of Allah's messenger, the Sa' was equal to a Mudd and third of the Mudd you use today, and the Sa' of today has become large."' (Sahih) Abu 'Abdur-Rahman (An-Nasa'i) said: And Ziyad bin Ayyub narrated it to me.
Reference: Sunan an-Nasa'i 2519 In-book : Book 23, Hadith 85 English translation : Vol. 3, Book 23, Hadith 2521
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