Sahih Muslim 1183 b
Abu Zubair heard Jabir b. 'Abdullah (Allah be pleased with them) as saying as he was asked about (the place for entering upon the) state of Ihram:
I heard (and I think he carried it directly to the Messenger of Allah) him saying: For the people of Medina Dhu'l-Hulaifa is the place for entering upon the state of Ihram, and for (the people coming through the other way, i.e. Syria) it is Juhfa; for the people of Iraq it is Dhat al-'Irq; for the people of Najd it is Qarn (al-Manazil) and for the people of Yemen it is Yalamlam.
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، وَعَبْدُ بْنُ حُمَيْدٍ، كِلاَهُمَا عَنْ مُحَمَّدِ بْنِ بَكْرٍ، - قَالَ عَبْدٌ أَخْبَرَنَا مُحَمَّدٌ، - أَخْبَرَنَا ابْنُ جُرَيْجٍ، أَخْبَرَنِي أَبُو الزُّبَيْرِ، أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ، - رضى الله عنهما - يُسْأَلُ عَنِ الْمُهَلِّ، فَقَالَ سَمِعْتُ - أَحْسِبُهُ، رَفَعَ إِلَى النَّبِيِّ صلى الله عليه وسلم - فَقَالَ ‏
"‏ مُهَلُّ أَهْلِ الْمَدِينَةِ مِنْ ذِي الْحُلَيْفَةِ وَالطَّرِيقُ الآخَرُ الْجُحْفَةُ وَمُهَلُّ أَهْلِ الْعِرَاقِ مِنْ ذَاتِ عِرْقٍ وَمُهَلُّ أَهْلِ نَجْدٍ مِنْ قَرْنٍ وَمُهَلُّ أَهْلِ الْيَمَنِ مِنْ يَلَمْلَمَ ‏"‏ ‏.‏