Sahih Bukhari Volume 2, Book 25, Hadith 1523

حَدَّثَنَا مَالِكُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا زُهَيْرٌ، قَالَ حَدَّثَنِي زَيْدُ بْنُ جُبَيْرٍ، أَنَّهُ أَتَى عَبْدَ اللَّهِ بْنَ عُمَرَ ـ رضى الله عنهما ـ فِي مَنْزِلِهِ وَلَهُ فُسْطَاطٌ وَسُرَادِقٌ، فَسَأَلْتُهُ مِنْ أَيْنَ يَجُوزُ أَنْ أَعْتَمِرَ قَالَ فَرَضَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم لأَهْلِ نَجْدٍ قَرْنًا، وَلأَهْلِ الْمَدِينَةِ ذَا الْحُلَيْفَةِ، وَلأَهْلِ الشَّأْمِ الْجُحْفَةَ‏

Narrated By Zaid bin Jubair : I went to visit 'Abdullah bin 'Umar at his house which contained many tents made of cotton cloth and these were encircled with Suradik (part of the tent). I asked him from where, should one assume Ihram for Umra. He said, "Allah's Apostle had fixed as Miqat (singular of Mawaqit) Qarn for the people of Najd, Dhul-Hulaifa for the people of Medina, and Al-Juhfa for the people of Sham."