Musnad Ahmad 844:1

Ibn Abi ‘Adi narrated to us, from Sulayman—meaning al-Taymi—from Anas, from some of the companions of the Prophet, may Allah bless him and grant him peace, that the Prophet, may Allah bless him and grant him peace, said: "On the night I was taken on the Night Journey, I passed by Musa, and he was praying in his grave."