"The Messenger of Allah came to me and there was a Jewish woman with me who was saying: 'You will be tested in your graves.' The Messenger of Allah got upset and said: 'Rather the Jews will be tested."' 'Aishah said: "A few nights later, the Messenger of Allah said: 'It has been revealed to me that you will be tested in your graves."' 'Aishah said; "Afterward I heard the Messenger of Allah seeking refuge with Allah from the torment of the grave.
Sunan an-Nasa'i Book 21, Hadith 247