حَدَّثَنَا هَدَّابُ بْنُ خَالِدٍ، وَشَيْبَانُ بْنُ فَرُّوخَ، قَالاَ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ ثَابِتٍ، الْبُنَانِيِّ وَسُلَيْمَانَ التَّيْمِيِّ عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ أَتَيْتُ - وَفِي رِوَايَةِ هَدَّابٍ مَرَرْتُ - عَلَى مُوسَى لَيْلَةَ أُسْرِيَ بِي عِنْدَ الْكَثِيبِ الأَحْمَرِ وَهُوَ قَائِمٌ يُصَلِّي فِي قَبْرِهِ ‏"‏ ‏.‏

Anas b. malik reported Allah's Messenger (PBUH) as saying: I came. And in the narration transmitted on the authority of Haddib (the words are): I happened to pass by Moses on the occasion of the Night journey near the red mound (and found him) saying his prayer in his grave. Translation Not Available

Book Ref: Sahih Muslim Book 43 Hadith 5858
Web Ref:  Sahih Muslim Book 30 Hadith 2375 a