What knowledge did the Prophet Muhammad (saw) share with 'A'isha that resulted in them taking a bath from one vessel between them?
 'A'isha reported:                      I and the Messenger of Allah (may peace be upon him) took a bath from one vessel which was placed between me and him and he would get ahead of me, so that I would say: Spare (some water for) me, spare (some water for) me; and she said that they had had sexual intercourse.