Hadith #1638 (Sunan al-Nasa'i)
Book: The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day
Narrator(s): Abdullah bin 'Abdullah bin al-Harith عبد الله بن عبد الله بن الحارث بن نوفل, Abdullah bin Khabbab ibn al-Aratt, al-Zuhri ابن شهاب الزهري‎, محمد بن مسلم, Amr bin 'Uthman bin Sa'id bin Kahtir عمرو بن عثمان بن سعيد بن كثير, Khabbab ibn al-Aratt

The Prophet (ﷺ) said: “I passed by the grave of Musa, peace be upon him, and he was praying in his grave.”

Source: https://parallelquran.com/hadith/sunan-al-nasai-1638/