Hadith 2008

Narrated 'Aishah: The Messenger of Allah (saws) 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.

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 ‏.‏

Reference: 920110
In-book reference: Book 11, Hadith 2008
Hadith 2008 - The Rites of Hajj (Kitab Al-Manasik Wa'l-Hajj) - Sunan Abi Dawud - Sunnah.com