Volume 1, Book 3, Number 135:

Narrated Nafi: 'Abdullah bin 'Umar said: "A man got up in the mosque and said: O Allah's Apostle 'At which place you order us that we should assume the Ihram?' Allah's Apostle replied, 'The residents of Medina should assure the Ihram from Dhil-Hulaifa, the people of Syria from Al-Ju,hfa and the people of Najd from Qarn." Ibn 'Umar further said, "The people consider that Allah's Apostle had also said, 'The residents of Yemen should assume Ihram from Yalamlam.' " Ibn 'Umar used to say, "I do not: remember whether Allah's Apostle had said the last statement or not?"