Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) said: "I saw that on the day of Uhud the face of the Messenger of Allah (peace and blessings be upon him) was wounded, his front tooth was injured, and his helmet was smashed. Sayyiduna Ali (may Allah be pleased with him) brought water in a shield, then Sayyidah Fatimah (may Allah be pleased with her) came and washed the blood off him, and she burned a piece of a mat and placed it on his wound."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5964