the Prophet sacrificed two Amlah horned rams, putting his foot on their sides and slaughtering them pronouncing the name of Allah, and saying: Allahu Akbar."" (Sahih )  

أَنَّ نَبِيَّ اللَّهِ ﷺ ضَحَّى بِكَبْشَيْنِ أَقْرَنَيْنِ أَمْلَحَيْنِ يَطَؤُ عَلَى صِفَاحِهِمَا وَيَذْبَحُهُمَا وَيُسَمِّي وَيُكَبِّرُ