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

O Allāh, I take refuge in You from the punishment of the grave, from the torment of the Fire, from the trials and tribulations of life and death, and from the evil affliction of al-Masīḥ al-Dajjāl.

Reference: Al-Bukhārī (2/102) and Muslim (1/412).