Yahya related to me from Malik that he had heard that theMessenger of Allah, may Allah bless him and grant him peace, said,"The whole of Arafa is a mawqif, except the middle of Urana, and thewhole of Muzdalifa is a standing-place, except for the middle ofMuhassir."
USC-MSA web (English) reference: Book 20, Hadith 175
Arabic reference: Book 20, Hadith 876