On the day (of the battle) of Uhad when (some) people retreated and left the Prophet, I saw `Aisha
bint Abu Bakr and Um Sulaim, with their robes tucked up so that the bangles around their ankles were
visible hurrying with their water skins (in another narration it is said, "carrying the water skins on
their backs"). Then they would pour the water in the mouths of the people, and return to fill the water
skins again and came back again to pour water in the mouths of the people. - Hadith Al Bukhari 2880 (islam)
Book 56, Hadith 95
Vol. 4, Book 52, Hadith 131