[Machine] I witnessed the messenger of Allah ﷺ in the farewell pilgrimage, and he brought with him a knife. He said, "Call for me Abu Hassan." So, he called Ali and then the messenger of Allah ﷺ said, "Take the lower part of the knife." And the messenger of Allah ﷺ took the upper part, and we used it to slaughter the sacrifices. After he finished, he rode the camel and Ali rode with him.  

شَهِدْتُ رَسُولَ اللهِ ﷺ فِي حَجَّةِ الْوَدَاعِ وَأَتَى بِالْبُدْنِ فَقَالَ «ادْعُوا لِي أَبَا حَسَنٍ» فَدَعَا عَلِيًّا فَقَالَ «خُذْ بِأَسْفَلِ الْحَرْبَةِ» وَأَخَذَ رَسُولُ اللهِ ﷺ بِأَعْلَاهَا فَقَطَعْنَا بِهَا الْبُدْنَ فَلَمَّا فَرَغَ رَكِبَ الْبَغْلَةَ فَأَرْدَفَ عَلِيًّا  

I was present with the Messenger of Allah ﷺ at the Farewell Pilgrimage. When the sacrificial camels were brought to him, he said: Call AbulHasan (Ali) to me. Ali was then called for and he (the Prophet) said to him: Catch hold of the lower end of the lance, and the Messenger of Allah ﷺ himself caught hold of the upper end. He then pierced the camels with it. When he finished slaughtering, he rode on his mule and mounted Ali behind him. (Using translation from Abū Dāʾūd 1766)   

شَهِدْتُ رَسُولَ اللهِ ﷺ فِي حَجَّةِ الْوَدَاعِ وَأُتِيَ بِالْبُدْنِ فَقَالَ ادْعُوا لِي أَبَا حَسَنٍ فَدُعِيَ لَهُ عَلِيٌّ فَقَالَ لَهُ خُذْ بِأَسْفَلِ الْحَرْبَةِ وَأَخَذَ رَسُولُ اللهِ ﷺ بِأَعْلَاهَا ثُمَّ طَعَنَا بِهَا الْبُدْنَ فَلَمَّا فَرَغَ رَكِبَ بَغْلَتَهُ وَأَرْدَفَ عَلِيًّا