Sunan an-Nasa'i

It was narrated from Al-Ju'aid: "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”