Narrated 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.' "

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 ﷺ 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 ﷺ.