Hadith 508760
Chapter 20: Hajj - كتاب الحج
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 " .
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."
Reference Muwatta Malik 508760
USC-MSA web (English) reference : Book 20, Hadith 175