It is narrated from Abdullah bin Umar (may Allah be pleased with him) that he said: The people of Madinah were commanded to assume Ihram from Dhu’l-Hulayfah, the people of Syria from Juhfah, and the people of Najd from Qarn (al-Manazil). Ibn Umar (may Allah be pleased with him) said: These are the three places which I myself heard from the Messenger of Allah (peace and blessings be upon him), and I have been informed that the Messenger of Allah (peace and blessings be upon him) said: “And the people of Yemen should assume Ihram from Yalamlam.”
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 761
Hadith Takhrijاخرجه البخاري، الاعتصام بالكتاب والسنة، باب ما ذكر النبي صلی اللہ علیہ وسلم على اتفاق اهل العلم ...... الخ ، رقم : 7344 ۔ ومسلم، الحج، باب مواقيت الحج، رقم: (1182)۔