"Men and women used to perform ablution from a single vessel during the time of the Messenger of Allah."  

كَانَ الرِّجَالُ وَالنِّسَاءُ يَتَوَضَّئُونَ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ مِنْ إِنَاءٍ وَاحِدٍ  

"Often my hand would touch the hand of the Messenger of Allah while performing ablution from a single vessel." (Hasan) Abu ʿAbdullah bin Majah said: "I heard Muhammad say: 'Umm Subyah was Khawlah bint Qais. I mentioned that to Abu Zurʿah and he said: "It is true."  

رُبَّمَا اخْتَلَفَتْ يَدِي وَيَدُ رَسُولِ اللَّهِ ﷺ فِي الْوُضُوءِ مِنْ إِنَاءٍ وَاحِدٍ قَالَ أَبُو عَبْدِ اللَّهِ ابْنُ مَاجَهْ سَمِعْتُ مُحَمَّدًا يَقُولُ أُمُّ صُبَيَّةَ هِيَ خَوْلَةُ بِنْتُ قَيْسٍ فَذَكَرْتُ لأَبِي زُرْعَةَ فَقَالَ صَدَقَ  

The Prophet and she used to perform ablution together for prayer.  

عَنِ النَّبِيِّ ﷺ أَنَّهُمَا كَانَا يَتَوَضَّآنِ جَمِيعًا لِلصَّلاَةِ