Sayyidah Umm Salamah (may Allah be pleased with her) said: "The Messenger of Allah (peace and blessings be upon him) and I used to take a ritual bath (ghusl) from a single vessel, both of us in a state of janabah, until our hands would meet."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20267