The Rites of Hajj (Kitab Al-Manasik Wa'l-Hajj)
11/87. Chapter:
Camping In The Valley Of Al-Muhassab
Sunan Abi Dawud
حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ إِنَّمَا نَزَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمُحَصَّبَ لِيَكُونَ أَسْمَحَ لِخُرُوجِهِ وَلَيْسَ بِسُنَّةٍ فَمَنْ شَاءَ نَزَلَهُ وَمَنْ شَاءَ لَمْ يَنْزِلْهُ .
Narrated 'Aishah: The Messenger of Allah (ﷺ) alighted at al-Muhassab so that it might be easier for him to proceed (to Medina). It is not a sunnah (i.e. a rite of Hajj). Anyone who desires may alight there, and anyone who does not want may not alight.
Reference : Sunan Abi Dawud 2008In-book reference : Book 11, Hadith 288English translation : Book 10, Hadith 2003