Sahih Muslim 696
Sahih Muslim · Book 6: The Book of Prayer - Travellers · Shortening the prayer in Mina
Wahb al-Khuza'i reported:
حَدَّثَنَا أَحْمَدُ بْنُ عَبْدِ اللَّهِ بْنِ يُونُسَ ، حَدَّثَنَا زُهَيْرٌ ، حَدَّثَنَا أَبُو إِسْحَاقَ ، حَدَّثَنِي حَارِثَةُ بْنُ وَهْبٍ الْخُزَاعِيُّ ، قَالَ صَلَّيْتُ خَلْفَ رَسُولِ اللَّهِ صلى الله عليه وسلم بِمِنًى وَالنَّاسُ أَكْثَرُ مَا كَانُوا فَصَلَّى رَكْعَتَيْنِ فِي حَجَّةِ الْوَدَاعِ . قَالَ مُسْلِمٌ حَارِثَةُ بْنُ وَهْبٍ الْخُزَاعِيُّ هُوَ أَخُو عُبَيْدِ اللَّهِ بْنِ عُمَرَ بْنِ الْخَطَّابِ لأُمِّهِ .
I prayed behind the Messenger of Allah (ﷺ) at Mina, and there was the greatest number of people, and they prayed two rak'ahs on the occasion of the Farewell Pilgrimage. (Muslim said: Haritha b. Wahb al-Khuza'i is the brother of 'Ubaidullah b. 'Umar son of Khattab from the side of his mother.)