Muslim Ibn Harith At-tamimiyi Radiyallahu 'anhu narrates that Rasullullah Sallallahu 'alaihi wasallam told him secretly: When you complete the Maghrib Salat, then recite seven times this Du'a: Allahumma Ajirna Minan Naar (O Allah! Protect me from the Fire). After saying this if you happen to die the same night, you will be protected from the Fire. When you have offered your Fajr Salat repeat the same. For undoubtedly, if you happen to die the same day, you will be protected from the Fire. (Abu Dawud: 5079)
Note: Rasullullah Sallallahu 'alaihi wasallam by giving this advice secretly wanted to stress its importance.
