Sunan Ibn Majah Book 36, Hadith 4027

حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ، وَمُحَمَّدُ بْنُ الْمُثَنَّى، قَالاَ حَدَّثَنَا عَبْدُ الْوَهَّابِ، حَدَّثَنَا حُمَيْدٌ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ لَمَّا كَانَ يَوْمُ أُحُدٍ كُسِرَتْ رَبَاعِيَةُ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ وَشُجَّ فَجَعَلَ الدَّمُ يَسِيلُ عَلَى وَجْهِهِ وَجَعَلَ يَمْسَحُ الدَّمَ عَنْ وَجْهِهِ وَيَقُولُ ‏ "‏ كَيْفَ يُفْلِحُ قَوْمٌ خَضَبُوا وَجْهَ نَبِيِّهِمْ بِالدَّمِ وَهُوَ يَدْعُوهُمْ إِلَى اللَّهِ ‏"‏ ‏.‏ فَأَنْزَلَ اللَّهُ عَزَّ وَجَلَّ ‏{لَيْسَ لَكَ مِنَ الأَمْرِ شَىْءٌ}‏ ‏.‏

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]