Sahih Bukhari
Pilgrimmage (Hajj)
Volume: 002 / Book Number: 026 / Hadith Number: 728
Narrated Usama bin Zaid:
As soon as the Prophet departed from 'Arafat, he went towards the mountain pass, and there he answered the call of) the prayer is ahead of you (i.e. at asked, "O Allah's Apostle! Will you offer the prayer here?" He replied, "(The place of) the prayer is ahead of you (i.e. at Al-Muzdalifa)."