Ibn Abbas (may Allah be pleased with them both) said that the Prophet (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 al-Manazil for the people of Najd, and Yalamlam for the people of Yemen, and he said: "These are for them, and also for those from other regions who pass by them while coming with the intention of Hajj and Umrah. Whoever is within them (closer to Makkah) should begin from wherever he sets out, so much so that the people of Makkah will begin their talbiyah and ihram from Makkah itself."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8921