Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: the Messenger of Allah (peace and blessings be upon him) said: "The people of Madinah should enter ihram from Dhu al-Hulayfah, the people of Syria from al-Juhfah, the people of Yemen from Yalamlam, and the people of Najd from Qarn."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10840