Sahih Bukhari Volume 7, Book 70, Hadith 5410

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي جَعْفَرُ بْنُ عَمْرِو بْنِ أُمَيَّةَ، أَنَّ أَبَاهُ، عَمْرَو بْنَ أُمَيَّةَ أَخْبَرَهُ أَنَّهُ، رَأَى النَّبِيَّ صلى الله عليه وسلم يَحْتَزُّ مِنْ كَتِفِ شَاةٍ فِي يَدِهِ، فَدُعِيَ إِلَى الصَّلاَةِ فَأَلْقَاهَا وَالسِّكِّينَ الَّتِي يَحْتَزُّ بِهَا، ثُمَّ قَامَ فَصَلَّى، وَلَمْ يَتَوَضَّأْ‏

Narrated By 'Amr bin Umaiyya : That he saw the Prophet holding a shoulder piece of mutton in his hand and cutting part of it with a knife. Then he was called for the prayer whereupon he put down the shoulder piece and the knife with which he was cutting it, and then stood for prayer without performing ablution again.