At-Tashahhud (sitting in prayer)
1. The Messenger of Allaah (صلي الله عليه و سلم) said:
“When one of you is finished saying the last tashahhud (the final one in his prayer), let him seek refuge in Allaah from four:
From the torture of the Hell-Fire,
from the torture in the grave,
from the trying misfortunes of life and death
and of the evil of the impostorous messiah [anichirst].
[Reference: Agreed upon by Bukhaaree and Muslim]
2. The Messenger of Allaah (صلي الله عليه و سلم) used to supplicate, in his prayer:
اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ عَذَابِ الْقَبْرِ، وَمِنْ عَذَابِ جَهَنَّمَ،
وَمِنْ فِتْنَةِ الْمَحْيَا وَالْمَمَاتِ، وَمِنْ شَرِّ فِتْنَةِ الْمَسِيحِ الدَّجَّالِ.
(O Allaah, 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)
[Reference: Bukhaaree and Muslim]