Sahih al-Bukhari, Book 73, Hadith 20 (In-Book) ⓘ
Narrated Anas: The Prophet used to offer as sacrifices, two horned rams, black and white in color, and used to put his foot on their sides and slaughter them with his own hands.
حَدَّثَنَا حَجَّاجُ بْنُ مِنْهَالٍ، حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، حَدَّثَنَا أَنَسٌ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ يُضَحِّي بِكَبْشَيْنِ أَمْلَحَيْنِ أَقْرَنَيْنِ، وَوَضَعَ رِجْلَهُ عَلَى صَفْحَتِهِمَا، وَيَذْبَحُهُمَا بِيَدِهِ.
also referenced under: Hadith 5564 (DarusSalam) & Volume 7, Book 68, Hadith 471 (USC-MSA)