Not repeating ablution after eating mutton and As-Sawiq Sahih al-Bukhari 208

Arabic hadith text
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي جَعْفَرُ بْنُ عَمْرِو بْنِ أُمَيَّةَ، أَنَّ أَبَاهُ، أَخْبَرَهُ أَنَّهُ، رَأَى رَسُولَ اللَّهِ صلى الله عليه وسلميَحْتَزُّ مِنْ كَتِفِ شَاةٍ، فَدُعِيَ إِلَى الصَّلاَةِ فَأَلْقَى السِّكِّينَ فَصَلَّى وَلَمْ يَتَوَضَّأْ‏.‏
Translation
Narrated Ja`far bin `Amr bin Umaiya

My father said, "I saw Allah's Messenger (ﷺ) taking a piece of (cooked) mutton from the shoulder region and then he was called for prayer. He put his knife down and prayed without repeating ablution."