Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: "The Messenger of Allah (peace and blessings be upon him) appointed Dhu al-Hulayfah as the miqat for the people of Madinah, al-Juhfah for the people of Sham, Qarn for the people of Najd, and Yalamlam for the people of Yemen."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13518