Sayyiduna Anas (may Allah be pleased with him) said: On the day of Uhud, when some people broke away from the Prophet (peace and blessings be upon him), and Sayyiduna Abu Talhah (may Allah be pleased with him) was in front of the Prophet (peace and blessings be upon him), shielding him (peace and blessings be upon him) with a shield, (Sayyiduna Anas (may Allah be pleased with him)) said: I saw Sayyidah Aishah (may Allah be pleased with her) and Sayyidah Umm Sulaym (may Allah be pleased with her) with their garments tucked up; I could see the anklets on their shins. They would carry water-skins on their backs and pour (water) into the people's mouths, then go back, fill the water-skins, come again and pour water into the people's mouths.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 17854