The Sa’ of Madinah and the Prophet’s Mudd

Narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Noble Prophet (peace and blessings of Allah be upon him) said: "O Allah! Bless them (i.e., the people of Madinah) in their measures, sa’ and mudd (units of measurement)."

Narrated from Sayyiduna Sa’ib bin Yazid (may Allah be pleased with him): In the time of the Prophet (peace and blessings of Allah be upon him), the Sa’ (which is a measure of volume) was equal to your one Mudd and one third of it.