Volume 2 · Book 26 · Hadith 718
Narrated Haritha bin Wahab Al-Khuza'i: The Prophet led us in a two-Rakat prayer at Mina although our number was more than ever and we were in better security than ever.
— Sahih Bukhari, Volume 2, Book 26: Pilgrimmage (Hajj), Hadith #718