"The Messenger of Allah ﷺ addressed us on the day of Al-Adha and went to two black and white rams and slaughtered them."  

خَطَبَنَا رَسُولُ اللَّهِ ﷺ يَوْمَ أَضْحَى وَانْكَفَأَ إِلَى كَبْشَيْنِ أَمْلَحَيْنِ فَذَبَحَهُمَا  

Abdullah (bin Umar) told him that the Messenger of Allah ﷺ used to offer sacrifice in the prayer place.  

أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَذْبَحُ أَوْ يَنْحَرُ بِالْمُصَلَّى