Sunan Abi Dawud — The Rites of Hajj (Kitab Al-Manasik Wa'l-Hajj) — Hadith No: 2008
Translation
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