Musnad Ahmad 1060:58

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from ‘Awn ibn Abi Juhayfah, from his father, from al-Bara’, from Abu Ayyub al-Ansari, who said: The Messenger of Allah (may Allah bless him and grant him peace) went out when the sun had set. He said: He heard a sound, so he said: "The Jews are being punished in their graves."