Sahih Bukhari Volume 2, Book 26, Hadith Number 599.

Narated By Ibn Abbas : Allah’s Apostle (p.b.u.h) made Dhul-Huiaifa as the Miqat for the people of Medina; Al-Juhfa for the people of Sham; Qarn-al-Manazil for the people of Najd; and Yalamlam for the people of Yemen; and these Mawaqit are for the people at those very places, and besides them for those who come thorough those places with the intention of performing Hajj and ‘Umra; and whoever is living within these boundaries can assume lhram from the place he starts, and the people of Mecca can assume Ihram from Mecca.