Abu Muslima (may Allah have mercy on him) narrates that the brother of Sayyidah Aisha (may Allah be pleased with her), (Sayyiduna Abdur Rahman bin Abi Bakr), asked her about the bathing (ghusl) of the Prophet Muhammad (peace and blessings be upon him). So she (may Allah be pleased with her) called for a vessel like a sa’ (a specific measure). Then she performed ghusl and poured water over herself, while there was a curtain between us and her.
Hadith Referenceاللؤلؤ والمرجان / كتاب الحيض / 185
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 5 كتاب الغسل: 3 باب الغسل بالصاع ونحوه»
Brief Explanation
He, Sayyiduna Abu Salamah radi Allahu anhu, was the foster nephew of Sayyidah Aishah radi Allahu anha, and was her mahram. Abu Salamah, along with Sayyiduna Abdur Rahman bin Abi Bakr radi Allahu anhu, went to the Mother of the Believers, and she, from behind a veil, performed ritual bath (ghusl) and taught them the method of performing ritual bath. (Secret)