Sahih Bukhari
Sahih Bukhari Volume 002, Book 026, Hadith Number 614.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 26. Pilgrimmage (Hajj)
Narated By Salim bin 'Abdullah : I heard my father saying, "Never did Allah's Apostle assume Ihram except at the Mosque, that is, at the Mosque of Dhul-Hulaifa.