Sahih al-Bukhari, Hadith 5511 ⓘ
Narrated Asma': We slaughtered a horse (by Dhabh) during the lifetime of Allah's Messenger while we were at Medina, and we ate it.
حَدَّثَنَا إِسْحَاقُ، سَمِعَ عَبْدَةَ، عَنْ هِشَامٍ، عَنْ فَاطِمَةَ، عَنْ أَسْمَاءَ، قَالَتْ ذَبَحْنَا عَلَى عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَرَسًا وَنَحْنُ بِالْمَدِينَةِ فَأَكَلْنَاهُ.
also referenced under: Book 72, Hadith 37 (In-Book) & Volume 7, Book 67, Hadith 419 (USC-MSA)