Sunan an-Nasa'i, Volume 5, Book 43, Hadith 4393 (DarusSalam) ⓘ
It was narrated that Anas bin Malik said: "The Messenge of Allah addressed us on the Day of Sacrifice, and he went toward two Amlah rams and sacrificed them." An abridgment. (Sahih )
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا حَاتِمُ بْنُ وَرْدَانَ، عَنْ أَيُّوبَ، عَنْ مُحَمَّدِ بْنِ سِيرِينَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ خَطَبَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم يَوْمَ أَضْحَى وَانْكَفَأَ إِلَى كَبْشَيْنِ أَمْلَحَيْنِ فَذَبَحَهُمَا . مُخْتَصَرٌ .
also referenced under: Hadith 4388 (Reference) & Book 43, Hadith 28 (In-Book)