Sunan Ibn Majah 3010

ʿAlī ibn Muḥammad narrated to us: Yaḥyā ibn Ādam narrated to us, from Sufyān, from ʿAbd al-Raḥmān ibn ʿAyyāsh, from Zayd ibn ʿAlī, from his father, from ʿUbayd Allāh ibn Abī Rāfiʿ, from ʿAlī, who said: The Messenger of God (peace and blessings be upon him) stood at ʿArafah and said, “This is the place of standing, and all of ʿArafah is a place of standing.”