Sahih Bukhari
Pilgrimmage (Hajj)
Volume: 002 / Book Number: 026 / Hadith Number: 620
Narrated Anas:
The Prophet offered four Rakat of the Zuhr prayer in Medina and two Rakat of the 'Asr prayer in Dhul-Hulaifa and I heard them (the companions of the Prophet) reciting Talbiya together loudly to the extent of shouting.