Sahih al-Bukhari 5551
Sahih al-Bukhari · Book 73: Al-Adha Festival Sacrifice (Adaahi) · Al-Adha and to slaughter sacrifices at the Musalla
Narrated Nafi':
حَدَّثَنَا مُحَمَّدُ بْنُ أَبِي بَكْرٍ الْمُقَدَّمِيُّ ، حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ ، حَدَّثَنَا عُبَيْدُ اللَّهِ ، عَنْ نَافِعٍ ، قَالَ كَانَ عَبْدُ اللَّهِ يَنْحَرُ فِي الْمَنْحَرِ. قَالَ عُبَيْدُ اللَّهِ يَعْنِي مَنْحَرَ النَّبِيِّ صلى الله عليه وسلم.
'Abdullah (bin 'Umar) used to slaughter his sacrifice at the slaughtering place (i.e the slaughtering place of the Prophet (ﷺ) ) .