The Prophet ﷺ and Maymunah performed ghusl together from a single vessel, a large bowl that still bore traces of dough.
حدثنا أبو عامر الأشعري عبد الله بن عامر حدثنا يحيى بن أبي بكير حدثنا إبراهيم بن نافع عن ابن أبي نجيح عن مجاهد
أن النبي ﷺ اغتسل وميمونة من إناء واحد في قصعة فيها أثر العجين
Its isnad is daif. Nasai narrated it, 1/131, chapter on the prohibition of washing in the vessel used for kneading dough, hadith 241, from Ibrahim through the same chain.Abdullah bin Abu Najeeh narrated much from Mujahid and used to practice tadlis from him, as Nasai described him in Tabaqat al-Mudallisin, the third category, and the hadith of Nasai, 415, suffices in its place.