The Messenger of Allah ﷺ used to bathe from major ritual impurity using a vessel called the faraq.In another narration, she said, "The Prophet ﷺ and I used to bathe from a single vessel, a cup called the faraq."
أن رسول الله ﷺ كان يغتسل من إناء- هو الفرق- من الجنابة… وفي رواية قالت: كنت أغتسل أنا والنبي ﷺ من إناء واحد من قدح، يقال له الفرق.
The first narration was reported by Malik in the Book of Purification (68), and from him by Muslim in the Book of Menstruation (319). It was mentioned earlier in the chapter on the recommended amount of water for ghusl and wudu. The second narration was reported by Bukhari in the Book of Ghusl (250) and Muslim in the Book of Menstruation (319), both through the route of Zuhri, from Urwa, from Ayesha, and she related the hadith.Muslim then reported through other routes from Ayesha, including her statement, "Our hands would go back and forth in it because of janaba." And also her statement, "I would perform ghusl together with the Messenger of Allah ﷺ from a single vessel between us, and he would race me, until I would say, 'Leave some for me, leave some for me,' " she said, "and both of us were in a state of janaba."In another narration reported by him, from Abu Salama bin Abdul-Rahman, he said, "My foster brother and I went to see Ayesha, and I asked her about the first ghusl the Prophet ﷺ performed after janaba. She called for a vessel the size of a saa, and she performed ghusl while there was a screen between us and her, and she poured water on her head three times." He said, "The wives of the Prophet ﷺ used to cut from their hair until it was like a wafra." Bukhari also mentioned this in brief (351). And in another narration reported by him (299), "The Prophet ﷺ and I would perform ghusl together from a single vessel, both of us being in janaba."The faraq, with the ra either vowelled or unvowelled, is a vessel holding sixteen rutls. Sufyan said that the faraq is three saas.As for her saying, "They used to cut from their hair until it was like a wafra," this means they would cut from the hair of their heads and thin it out until it became like a wafra, which is hair that reaches down to the ears and does not go beyond them.