Sahih Bukhari Volume 5, Book 58, Hadith Number 270.

Narated By ‘Abdur-Rahman bin Humaid Az-Zuhri : I heard ‘Umar bin ‘Abdul-Aziz asking As-Sa’ib, the nephew of An-Nimr. “What have you heard about residing in Mecca?” The other said, “I heard Al-Ala bin Al-Hadrami saying, Allah’s Apostle said: An Emigrant is allowed to stay in Mecca for three days after departing from Mina (i.e. after performing all the ceremonies of Hajj)”