Sahih Bukhari
Pilgrimmage (Hajj)
Volume: 002 / Book Number: 026 / Hadith Number: 717
Narrated 'Abdullah bin 'Umar :
Allah's Apostle offered a two-Rakat prayer at Mina. Abu Bakr, 'Umar and 'Uthman, (during the early years of his caliphate) followed the same practice.