As soon as the Messenger of Allâh [pbuh] reached the defile, ‘Ali bin Abu Talib went out and filled his water container with water from Al-Mihras. ‘Al-Mihras’ is said to be hollow (concaved) rock containing plenty of water. It was also said that it is a water spring in Uhud mountain. Anyway, ‘Ali brought that water to the Messenger of Allâh [pbuh] to drink. Finding that it smelt bad he refused to drink it, but only washed the blood off his face and poured some of it over his head saying: Allâh’s Wrath is great on those who besmeared His Messenger’s face with blood. [Ibn Hisham 2/85]
Sahl said: "By Allâh, I know who washed the wound of the Messenger of Allâh [pbuh] and who poured out water for him and what (substances) his wound was treated with: His daughter Fatimah washed it, whereas ‘Ali poured water out of the container. When Fatimah realized that water increased the flow of blood, she took a piece of straw mat, burnt it a little and stuck it to the wound so blood ceased flowing." [Sahih Al-Bukhari 2/584]
Muhammad bin Maslamah brought him fresh water to drink. The Prophet [pbuh] drank and supplicated Allâh to provide him with good things. [As-Seerat Al-Halabiyah 2/30] Owing to the wounds and their bad effects on his body, the Messenger of Allâh [pbuh] led his followers in prayer in a sitting posture and so did the Muslims. [Ibn Hisham 2/87]