Narrated 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.
Hadith Referenceصحيح البخاري / كتاب الحج / 1541
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة