Sahih Muslim Book - 3, Hadith - 792

و حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ حَدَّثَنَا إِبْرَاهِيمُ بْنُ سَعْدٍ حَدَّثَنَا الزُّهْرِيُّ عَنْ جَعْفَرِ بْنِ عَمْرِو بْنِ أُمَيَّةَ الضَّمْرِيِّ عَنْ أَبِيهِ أَنَّهُ رَأَى رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَحْتَزُّ مِنْ كَتِفٍ يَأْكُلُ مِنْهَا ثُمَّ صَلَّى وَلَمْ يَتَوَضَّأْ.

It was narrated from Ja'far bin 'Amr bin Umayyah Al-Damri, from his father, that he saw the Messenger of Allah (s.a.w) cut (some meat) from a lamb shoulder and eat it, then he prayed and he did not perform Wudu'.