Sahih Muslim Book 7, Hadith Number 3135.

Chapter : The Muhajir is permitted to stay for three days in Mecca after Hajj and Umra and not more than this.

Al-‘Ali,’ b. al-Hadrami reported Allah’s Messenger (may peace be upon him) as saying: The Muhijir should stay at Mecca after performing the rituals (of Hajj) but for three (days) only.