أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ سُلَيْمَانَ، عَنْ أَنَسٍ، عَنْ بَعْضِ، أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ‏"‏ لَيْلَةَ أُسْرِيَ بِي مَرَرْتُ عَلَى مُوسَى وَهُوَ يُصَلِّي فِي قَبْرِهِ ‏"‏ ‏.‏

It was narrated from Anas, from on of the companions of the Prophet (PBUH), that: The Prophet (PBUH) said: 'On the night on which I was taken on the Night Journey, I passed by Musa and he was praying in his grave.' Translation Not Available

Book Ref: Sunan An Nisai Book 20 Hadith 1637
Web Ref:  Sunan An Nisai Vol 2 Book 20 Hadith 1638