اللّٰهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ جَهَنَّمَ، وَمِنْ عَذَابِ الْقَبْرِ، وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ، وَمِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ
Allahumma inni a'udhu bika min adhabi jahannam, wa min adhabil-qabr, wa min fitnatil-mahya wal-mamat, wa min sharri fitnatil-masihid-dajjal
O Allah, I seek Your refuge from the punishment of Hellfire, the punishment of the grave, the trials of life and death, and from the evil of the trial of the False Messiah.
Hisnul Muslim 55 — said in final tashahud before salam · Sahih — Muslim 588, Bukhari 1377