[Machine] The Messenger of Allah ﷺ used to buy two healthy rams when he intended to sacrifice. Then, when he prayed and delivered the sermon, he would call one of them while it was in the place of prayer, and slaughter it. Afterwards, he would say, "O Allah, this is on behalf of my entire Ummah, whoever testifies to Your Oneness and testifies in support of my message." Then he would go to the other ram and slaughter it, and say, "O Allah, this is on behalf of Muhammad and his family."
كَانَ رَسُولُ اللهِ ﷺ إِذَا أَرَادَ أَنْ يُضَحِّيَ اشْتَرَى كَبْشَيْنِ أَقْرَنَيْنِ أَمْلَحَيْنِ فَإِذَا صَلَّى وَخَطَبَ دَعَا بِأَحَدِهِمَا وَهُوَ فِي مُصَلَّاهُ فَذَبَحَهُ ثُمَّ قَالَ «اللهُمَّ هَذَا عَنْ أُمَّتِي جَمِيعًا مَنْ شَهِدَ لَكَ بِالتَّوْحِيدِ وَشَهِدَ لِي بِالْبَلَاغِ» ثُمَّ أَتَى الْآخَرَ فَذَبَحَهُ ثُمَّ قَالَ «اللهُمَّ هَذَا عَنْ مُحَمَّدٍ وَأَهْلِ بَيْتِهِ»