Qatadah (may Allah have mercy on him) says: I heard Sayyiduna Anas bin Malik (may Allah be pleased with him) narrate, so I asked him: Did you hear this yourself (from the Prophet ﷺ)? He replied: Yes! The Messenger of Allah ﷺ used to sacrifice two horned, black and white rams, and he would say “Bismillah, Allahu Akbar.” I saw that he was slaughtering them with his blessed hand and had his blessed foot placed upon them.
Hadith Referenceالمنتقى ابن الجارود / كتاب الطلاق / 909
Hadith Gradingغلام مصطفےٰ ظهير امن پوري:صحيح
Hadith Takhrijاز غلام مصطفےٰ ظهير امن پوري:«صحيح البخاري : 5558، صحيح مسلم : 1966۔»