Umm Kulthum bint Abdullah bin Zam'ah (may Allah have mercy on her) relates that her grandmother, Sayyidah Umm Salamah (may Allah be pleased with her), the wife of the Messenger of Allah (peace and blessings be upon him), gave her a brass basin and said: "The Messenger of Allah (peace and blessings be upon him) used to take the ritual bath (ghusl) in this." The narrator Talhah said: It held about one sa' or a little less.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20132