From his father, that the Prophet ﷺ gave a Khutbah, then he descended and called for two rams and slaughtered them.  

أَنَّ النَّبِيَّ ﷺ خَطَبَ ثُمَّ نَزَلَ فَدَعَا بِكَبْشَيْنِ فَذَبَحَهُمَا