Sunan an-Nasa'i · Hadith 1634
The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day - كتاب قيام الليل وتطوع النهار
أخبرنا علي بن خشرم، قال حدثنا عيسى، عن سليمان التيمي، عن أنس بن مالك، قال قال رسول الله صلى الله عليه وسلم " مررت ليلة أسري بي على موسى عليه السلام وهو يصلي في قبره " .
It was narrated that Anas bin Malik said: "The Messenger of Allah (ﷺ) said: 'On the night on which I was taken on the Night Journey, I passed by Musa, peace be upon him, and he was praying in his grave.'"
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).