It was narrated that Anas bin Malik said:
On the Day of Uhud, a molar
of the Messenger of Allah (ﷺ) was broken and he was wounded. Blood
started pouring down his face, and he started to wipe his face and
say: “How can any people prosper if they soak the face of their
Prophet with blood when he is calling them to Allah?” Then Allah
revealed: “Not for you is the decision.”[3:128]