"My father told me: 'We came to Jabir bin ʿAbdullah and asked him about the Hajj of the Prophet. He told us that the Prophet said: "All of Arafat is the place of standing." (Using translation from Nasāʾī 3015)
عَنْ حَجَّةِ النَّبِيِّ ﷺ فَحَدَّثَنَا أَنَّ نَبِيَّ اللهِ ﷺ قَالَ «عَرَفَةُ كُلُّهَا مَوْقِفٌ»