اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ جَهَنَّمَ وَمِنْ عَذَابِ الْقَبْرِ وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ وَمِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ
Transliteration
Allahumma inni a'udhu bika min 'adhabi jahannama wa min 'adhabil-qabri wa min fitnatil-mahya wal-mamati wa min sharri fitnatil-masihid-dajjal
English meaning
O Allah, I seek refuge in You from the punishment of Hellfire, from the punishment of the grave, from the trials of life and death, and from the evil of the trial of the False Messiah.
When is it recited?
Recited in the final sitting of every prayer.
Source
Muslim, Masajid 128, 588