Hadith 2310
Sayyiduna Abu Sa'id Khudri رضي الله عنه narrates in a marfu' form that the Prophet صلى الله عليه وسلم said: "There is no zakat on less than five wasq, and one wasq is sixty sa’." Imam Abu Bakr رحمه الله says that by "makhtoom" is meant "sa’." There is no difference of opinion among the scholars regarding this, that one wasq is sixty sa’. And I have already mentioned the measure of a sa’ in the Book of Faith and Vows, in the chapter regarding the expiation of oaths.