Sahih Bukhari

Narrated Khalid bin Al-Harith:'Ubaidullah was asked about Al Mahassab. 'Ubaidullah narrated: Nafi` said, 'Allah's Messenger (ﷺ), `Umar and Ibn `Umar camped there."" Nafi` added, ""Ibn `Umar used to offer the Zuhr and `Asr prayers at it (i.e. Al-Mahassab)."" I think he mentioned the Maghrib prayer also. I said, ""I don't doubt about `Isha' (i.e. he used to offer it there also), and he used to sleep there for a while. He used to say, 'The Prophet (ﷺ) used to do the same