It (i.e. Al-Abtah) was a place where the Prophet (ﷺ) used to camp so that it might be easier for him to depart.
Sahih al-Bukhari Book 25, Hadith 241
← Previous Hadith The Prophet (ﷺ) offered the Zuhr, `Asr, Maghrib and `Isha' prayers and slept for a while at a place called Al-Mahassab and then he rode towards the Ka`ba and performed Tawaf (al-Wada`).

Sahih al-Bukhari Book 25, Hadith 240 Next Hadith → Staying at Al-Mahassab is not one of the ceremonies (of Hajj), but Al-Mahassab is a place where Allah's Messenger (ﷺ) camped (during his Hajjat-al-Wida).

Sahih al-Bukhari Book 25, Hadith 242