(6) باب الأَضْحَى وَالْمَنْحَرِ بِالْمُصَلَّى
Ibn 'Umar said, "Allah's Messenger (ﷺ) used to slaughter (camels and sheep, etc.,) as sacrifices at the Musalla."
Reference: Sahih al-Bukhari 5552
In-book reference: Book 73, Hadith 8
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 68, Hadith 459