It is narrated from Sayyidah Umm Hani (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) and Sayyidah Maymunah (may Allah be pleased with her) took a bath from a single vessel, a bowl that had a trace of dough in it.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21419