Jami` at-Tirmidhi, Volume 3, Book 17, Hadith 1494 (DarusSalam) ⓘ
Narrated Anas bin Malik: "The Messenger of Allah slaughtered two horned male sheep which were mostly white. He slaughtered them with his hand and mentioned Allah's Name, and he said 'Allahu Akbar', and put his foot on their side."
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ ضَحَّى رَسُولُ اللَّهِ صلى الله عليه وسلم بِكَبْشَيْنِ أَمْلَحَيْنِ أَقْرَنَيْنِ ذَبَحَهُمَا بِيَدِهِ وَسَمَّى وَكَبَّرَ وَوَضَعَ رِجْلَهُ عَلَى صِفَاحِهِمَا . قَالَ وَفِي الْبَابِ عَنْ عَلِيٍّ وَعَائِشَةَ وَأَبِي هُرَيْرَةَ وَأَبِي أَيُّوبَ وَجَابِرٍ وَأَبِي الدَّرْدَاءِ وَأَبِي رَافِعٍ وَابْنِ عُمَرَ وَأَبِي بَكْرَةَ أَيْضًا . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
also referenced under: Hadith 1494 (Reference) & Book 19, Hadith 2 (In-Book)