Sahih Bukhari Volume 2, Book 25, Hadith 1769

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عَبْدِ الْوَهَّابِ، حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ، قَالَ سُئِلَ عُبَيْدُ اللَّهِ عَنِ الْمُحَصَّبِ، فَحَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ،، قَالَ نَزَلَ بِهَا رَسُولُ اللَّهِ صلى الله عليه وسلم وَعُمَرُ وَابْنُ عُمَرَ‏.‏ وَعَنْ نَافِعٍ أَنَّ ابْنَ عُمَرَ ـ رضى الله عنهما ـ كَانَ يُصَلِّي بِهَا ـ يَعْنِي الْمُحَصَّبَ ـ الظُّهْرَ وَالْعَصْرَ ـ أَحْسِبُهُ قَالَ وَالْمَغْرِبَ‏.‏ قَالَ خَالِدٌ لاَ أَشُكُّ فِي الْعِشَاءِ، وَيَهْجَعُ هَجْعَةً، وَيَذْكُرُ ذَلِكَ عَنِ النَّبِيِّ صلى الله عليه وسلم‏.

Narrated By Khalid bin Al-Harith : 'Ubaidullah was asked about Al Mahassab. 'Ubaidullah narrated: Nafi' said, 'Allah's Apostles, '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 used to do the same.'"