Yahya related to me from Malik that he had heard that the Messenger of Allah, may Allah bless him and grant him peace, said, "The whole of Arafa is a mawqif, except the middle of Urana, and the whole of Muzdalifa is a standing-place, except for the middle of Muhassir."


حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ عَرَفَةُ كُلُّهَا مَوْقِفٌ وَارْتَفِعُوا عَنْ بَطْنِ عُرَنَةَ وَالْمُزْدَلِفَةُ كُلُّهَا مَوْقِفٌ وَارْتَفِعُوا عَنْ بَطْنِ مُحَسِّرٍ ‏"‏ ‏.‏
USC-MSA web (English) reference : Book 20, Hadith 175
Arabic reference : Book 20, Hadith 876