It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) appointed Dhu’l-Hulayfah as the miqat for the people of Madinah, Qarn for the people of Najd, and Juhfah for the people of Sham. These three places I myself remember having heard from the Prophet (peace and blessings be upon him), and it has been related to me that the Prophet (peace and blessings be upon him) said: “Yalamlam is for the people of Yemen.” Someone asked about Iraq, so he said: At that time, Iraq did not exist.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5111
Hadith Gradingحکم دارالسلام:إسناده صحيح ، خ : 7344 .