Yahya related to me from Malik from Hisham ibn Urwa from hisfather that A'isha, umm al-muminin, said, "I do not mind whether Ipray in the Hijr or in the House." (i.e. praying in the Hijr is thesame as praying in the House).
USC-MSA web (English) reference: Book 20, Hadith 106
Arabic reference: Book 20, Hadith 809