Taking ghusl together from the same container of water. Other narrations mention they used to playfully compete for the amount water whilst taking ghusl.
Narrated Hisham bin `Urwa: (on the authority of his father) `Aisha said, “Whenever Allah’s Messenger (ﷺ) took the bath of Janaba, he cleaned his hands and performed ablution like that for prayer and then took a bath and rubbed his hair, till he felt that the whole skin of the head had become wet, then he would pour water thrice and wash the rest of the body.” `Aisha further said, “I and Allah’s Messenger (ﷺ) used to take a bath from a single water container, from which we took water simultaneously.”
Evidence – http://sunnah.com/bukhari/5/25
(continued via The Ideal Muslimah, posted 5 hr ago)