اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ الْقَبْرِ، وَمِنْ عَذَابِ جَهَنَّمَ، وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ، وَمِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ
Allaahumma innee a oothu bika min l athaabil-qabri, wa min athaabi jahannama, wa min fitnatil-mahyaa walmamaati, wa min sharri fitnatil-maseehid-dajjaal.
O Allah, I seek refuge in You from the punishment of the grave, and from the punishment of Hell-fire, and from the trials of life and death, and from the evil of the trial of the False Messiah.
Al-Bukhari 2/102, Muslim 1/412, and this is Muslim s wording.