I placed water out for the Prophet ﷺ and screened him off, and he bathed.
وضعت للنبي ﷺ ماء، وسترته فاغتسل.
Bukhari narrated it in ghusl (276), and Muslim in menstruation (337), both through Amash, from Salim bin Abu Jaad, from Kurayb, from Ibn Abbas, from Maymuna, and he related it. The wording given is Muslim's. This is a portion of her hadith mentioned regarding the manner of ghusl.