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 molarof the Messenger of Allah (PBUH) was broken and he was wounded. Bloodstarted pouring down his face, and he started to wipe his face andsay: “How can any people prosper if they soak the face of theirProphet with blood when he is calling them to Allah?” Then Allahrevealed: “Not for you is the decision.”[3:128] Translation Not Available

Book Ref: Sunan Ibn Majah Book 36 Hadith 4027
Web Ref:  Sunan Ibn Majah Vol 5 Book 36 Hadith 4027