Sunan Ibn Majah Book 1, Hadith 109
"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)
"The Messenger of Allah forbade men to perform ablution with the water left over by a woman, and women to perform ablution with water left over by a man, however both (spouses) may start to perform their ablutions at the same time."
Abu `Abdullah Ibn Majah said: "The first (narration) is correct, and the second (narration) is Wahm (an error)."
Another chain with similar wording.
"The Messenger of Allah and I would take a bath from a single vessel."