"The Prophet and his wife would take a bath from one vessel, but neither of them would have a bath with the leftover water of the other." (Daif)
كَانَ النَّبِيُّ ﷺ وَأَهْلُهُ يَغْتَسِلُونَ مِنْ إِنَاءٍ وَاحِدٍ وَلاَ يَغْتَسِلُ أَحَدُهُمَا بِفَضْلِ صَاحِبِهِ
The Messenger of Allah ﷺ and his wife used to do ghusl from the same vessel.
كَانَ رَسُولُ اللهِ ﷺ وَأَهْلُهُ يَغْتَسِلُونَ مِنْ إِنَاءٍ وَاحِدٍ
" عَن عَلِىٍّ قَالَ: وإنَّ رسولُ الله ﷺ يَغْتَسِلُ هُو وَأهْلُهُ مِن إنَاءٍ وَاحِدٍ، وَلاَ يَغْتَسِلُ أحَدُهُمَا بَفَضْلِ صَاحِبِهِ ".