I saw Messenger of Allah ﷺ cutting part of the shoulder of mutton with a knife. He ate of it and then was called for prayer whereupon he got up and put down the knife and offered the prayer without performing new ablution.
رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَحْتَزُّ مِنْ كَتِفِ شَاةٍ فَأَكَلَ مِنْهَا فَدُعِيَ إِلَى الصَّلاَةِ فَقَامَ فَطَرَحَ السِّكِّينَ فَصَلَّى وَلَمْ يَتَوَضَّأْ