"Na'im the freed slave of Umm Salamah narrated to me that Umm Salamah was asked: 'Can a woman perform Ghusl with a man?' She said: 'Yes, if she is well-mannered.[1] I remember the Messenger of Allah (ﷺ) and I performing Ghusl from a single wash tub. We would pour water on our hands until they were clean then pour water over them.'" Al-A'raj said: "Not mentioning the private area not paying attention to it." [1] Kaiysah:" Well-mannered when using the water with the man" (An-Nihayah) And the comments by Al-A'raj after the narration refer to its meaning.
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ دَاوُدَ الأَوْدِيِّ، عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ، قَالَ لَقِيتُ رَجُلاً صَحِبَ النَّبِيَّ صلى الله عليه وسلم كَمَا صَحِبَهُ أَبُو هُرَيْرَةَ - رضى الله عنه - أَرْبَعَ سِنِينَ قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ يَمْتَشِطَ أَحَدُنَا كُلَّ يَوْمٍ أَوْ يَبُولَ فِي مُغْتَسَلِهِ أَوْ يَغْتَسِلَ الرَّجُلُ بِفَضْلِ الْمَرْأَةِ وَالْمَرْأَةُ بِفَضْلِ الرَّجُلِ وَلْيَغْتَرِفَا جَمِيعًا .
"I met a man who accompanied the Prophet (ﷺ) as Abu Hurairah (may Allah be pleased with him), accompanied him for four years. He said: 'The Messenger of Allah (ﷺ) forbade any one of us to comb his hair each day,[1] or to urinate in the place where he performs Ghusl, or for a man to perform Ghusl using the leftover water of a women, or a woman to perform Ghusl using the leftover water of a man - they should scoop it out together.'" [1] It is said this is to prevent him from making his physical appearance his main aim.
"I used to perform Ghusl - the Messenger of Allah (ﷺ) and I - from one vessel. He would compete with me and I would with him until he would say: 'Leave me some' and I would say: 'Leave me some.'"
It was narrated from Umm Hani' that the Messenger of Allah (ﷺ) performed Ghusl, he and Maimunah from a single vessel, a bowl in which there were traces of dough.
"I said: 'O Messenger of Allah, I am a woman with tightly braided hair; should I undo it when performing Ghusl from Janabah?' He said: 'No it is sufficient for you to pour three handfuls of water over your body.'"