Yahya related to me from Malik from Musa ibn Uqba that Salim ibnAbdullah heard his father say, "Your claim that the Messenger ofAllah, may Allah bless him and grant him peace, entered ihram fromthis desert of yours is not true, because he only entered ihram fromthe mosque, i.e. the mosque of Dhu'l-Hulayfa."
USC-MSA web (English) reference: Book 20, Hadith 30
Arabic reference: Book 20, Hadith 738