Sahih Muslim Book 7, Hadith Number 3077.

Chapter : The merit of entering the ka’ba for a pilgrim and observing of prayer in it.

Isma’il b. Abu Khalid reported: I asked Abdullah b. Abu Aufa (Allah be pleased with him), a Companion of Allah’s Messenger (may peace be upon him), whether Allah’s Apostle (may peace be upon him) had entered the House, while performing ‘Umra, He said: NO.