اَللَّهُمَّ إِنِّي أَعُوْذُ بِكَ مِنْ عَذَابِ جَهَنَّمَ وَمِنْ عَذَابِ الْقَبْرِ وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ وَمِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ

Allaahumma 'innee 'a'oodhu bika min 'adhaabi jahannam, wa min 'adhaabil-qabr, wa min fitnatil-mahyaa wal-mamaati, wa min sharri fitnatil-maseehid-dajjaal

O Allah! I seek refuge with Thee from the torment of the Hell, from the torment of the grave, from the trial of life and death and from the evil of the trial of Masih al-Dajjal. The Messenger of Allah (ﷺ) said: When any one of you utters tashahhud (in prayer) he must seek refuge in Allah from four (trials) and should thus say : (The dua is mentioned above)

Reference: Muslim: 588