Muwatta Malik 873
موطأ مالك#873SahihYahya 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliSahih
In-book reference: 20:169