Sahih Muslim Book 7, Hadith Number 3147.

Chapter : It is permissible to enter Mecca without Ihram.

Jabir b. Abdullah reported that Allah’s Apostle (may peace be upon him) entered on the day of Victory of Mecca wearing a black turban on his head. and she said: In case Allah cures me I will certainly go and observe prayer in Bait al-Maqdis. She recovered and so she made preparations to go out (to that place). She came to Maimuna, the wife of Allah’s Apostle (may peace be upon him) and after greeting her she informed her about it, whereupon she said: Stay here and eat the provision (which you had made) and observe prayer In the mosque of the Messenger (may peace be upon him), for I heard Allah’s Messenger (may peace be upon him) say: Prayer in it is better than a thousand prayers observed in other mosques except the mosque of the Ka’ba.