أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ ضَحَّى النَّبِيُّ صلى الله عليه وسلم بِكَبْشَيْنِ أَمْلَحَيْنِ أَقْرَنَيْنِ ذَبَحَهُمَا بِيَدِهِ وَسَمَّى وَكَبَّرَ وَوَضَعَ رِجْلَهُ عَلَى صِفَاحِهِمَا ‏.‏

It was narrated that Anas said: "The Prophet sacrificed two horned, Amlah rams, slaughtering them with his own hand, pronouncing the name of Allah, and saying: 'Allahu Akbar, and placing his foot on their sides." Translation Not Available

Book Ref: Sunan An Nisai Book 43 Hadith 4387
Web Ref:  Sunan An Nisai Vol 5 Book 43 Hadith 4392