What did the Prophet Muhammad (saw) say regarding the people of Medina, Sham, Najd, and Yemen assuming Ihram from specific locations?
 Narrated Nafi`:                     `Abdullah bin `Umar said, "Allah's Apostle 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 Apostle had said, 'The people of Yemen should assume Ihram from Yalamlam.' "