Sahih Bukhari Volume 2, Book 25, Hadith 1527

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا حَمَّادٌ، عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ وَقَّتَ رَسُولُ اللَّهِ صلى الله عليه وسلم لأَهْلِ الْمَدِينَةِ ذَا الْحُلَيْفَةِ، وَلأَهْلِ الشَّأْمِ الْجُحْفَةَ، وَلأَهْلِ نَجْدٍ قَرْنَ الْمَنَازِلِ، وَلأَهْلِ الْيَمَنِ يَلَمْلَمَ، فَهُنَّ لَهُنَّ وَلِمَنْ أَتَى عَلَيْهِنَّ مِنْ غَيْرِ أَهْلِهِنَّ، لِمَنْ كَانَ يُرِيدُ الْحَجَّ وَالْعُمْرَةَ، فَمَنْ كَانَ دُونَهُنَّ فَمُهَلُّهُ مِنْ أَهْلِهِ، وَكَذَاكَ حَتَّى أَهْلُ مَكَّةَ يُهِلُّونَ مِنْهَا‏

Narrated By Ibn Abbas : Allah's Apostle had fixed Dhul Hulaifa as the Mlqat for the people of Medina; Al-Juhfa for the people of Sham; and Qarn Ul-Manazil for the people of Najd; and Yalamlam for the people of Yemen. So, these (above mentioned) are the Mawaqit for all those living at those places, and besides them for those who come through those places with the intention of performing Hajj and 'Umra and whoever lives within these places should assume Ihram from his dwelling place, and similarly the people of Mecca can assume Ihram from Mecca.