It is narrated from a Companion (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The night I was taken on the Night Journey (Mi'raj), I passed by Musa (peace be upon him), who was standing in his grave performing prayer.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23062