Sahih Bukhari Volume 2, Book 26, Hadith Number 603.

Narated By Salim bin ‘Abdullah : From his father: I heard Allah’s Apostle saying, “The Miqat for the people of Medina is Dhul-Hulaifa; for the people of Sham is Mahita; (i.e. Al-Juhfa); and for the people of Najd is Qarn. And said Ibn ‘Umar, “They claim, but I did not hear personally, that the Prophet said, “The Miqat for the people of Yemen is Yalamlam.”