Narrated Jabir ibn Abdullah: I witnessed sacrificing along with the Messenger of Allah (ﷺ) at the place of prayer. When he finished his sermon, he descended from his pulpit, and a ram was brought to him. The Messenger of Allah (ﷺ) slaughtered it with his hand, and said: In the name of Allah, Allah, is Most Great. This is from me and from those who did not sacrifice from my community.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي الإِسْكَنْدَرَانِيَّ - عَنْ عَمْرٍو، عَنِ الْمُطَّلِبِ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، قَالَ شَهِدْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم الأَضْحَى بِالْمُصَلَّى فَلَمَّا قَضَى خُطْبَتَهُ نَزَلَ مِنْ مِنْبَرِهِ وَأُتِيَ بِكَبْشٍ فَذَبَحَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم بِيَدِهِ وَقَالَ " بِسْمِ اللَّهِ وَاللَّهُ أَكْبَرُ هَذَا عَنِّي وَعَمَّنْ لَمْ يُضَحِّ مِنْ أُمَّتِي " .
sunnah.com