(8) باب مِيقَاتِ أَهْلِ الْمَدِينَةِ وَلاَ يُهِلُّوا قَبْلَ ذِي الْحُلَيْفَةِ
Narrated Nafi`:
`Abdullah bin `Umar said, "Allah's Messenger (ﷺ) said, 'The people of Medina should assume lhram from Dhul-Hulaifa; the people of Sham from Al-Juhfa; and the people of Najd from Qarn." And `Abdullah added, "I was informed that Allah's Messenger (ﷺ) had said, 'The people of Yemen should assume Ihram from Yalamlam.' "
Reference: Sahih al-Bukhari 1525
In-book reference: Book 25, Hadith 13
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 26, Hadith 600