كُنْتُ أَغْتَسِلُ أَنَا وَالنَّبِيُّ، صلى الله عليه وسلم مِنْ إِنَاءٍ وَاحِدٍ مِنْ جَنَابَةٍ.
Aishah reported: The Prophet ﷺ and I used to take the ritual bath (ghusl) for janabah from a single vessel.
also in Sahih al-Bukhari 250, Sahih al-Bukhari 261, Sahih al-Bukhari 299, Sahih al-Bukhari 300, Sahih al-Bukhari 301