This excerpt is taken from Sheikh Hafiz Mubashir Hussain Lahori's book Signs of the Day of Judgment in the Light of Authentic Hadiths.
One should seek refuge from the trials of the Dajjal
عن عائشة رضي الله عنها قالت : إن رسول الله صلى الله عليه وسلم كان يستعيذ فى صلاته من فتنة الدجال
It is narrated from Hazrat Aisha (may Allah be pleased with her) that the Messenger of Allah (peace be upon him) used to seek refuge from the trial of the Dajjal in his prayer.
Reference: Bukhari: Book of Adhan: Chapter on Supplication before Salam 833
عن عائشة رضي الله عنها قالت أن رسول الله صلى الله عليه وسلم كان يدعو (يتعوذ) فى صلاته: اللهم إني أعوذ بك من عذاب القبر ، وأعوذ بك من فتنة المسيح الدجال وأعوذ بك من فتنة المحيا وفتنة الممات اللهم إني أعوذ بك من المأثم والمغرم
It is narrated from Hazrat Aisha (may Allah be pleased with her) that the Messenger of Allah (peace be upon him) used to recite this supplication in his prayer (in some narrations it is mentioned that he used to seek refuge in this way): O Allah! I seek refuge in You from the punishment of the grave, from the blind, the lame, and the false Messiah Dajjal, from the trials of life and death, and from sin and debt.
Reference: Bukhari: Book of Adhan: Chapter on Supplication before Salam 832, 6375 Muslim 590 Tirmidhi 3424 Ahmad 301/1, 363, 370 Nasa'i 2062 Al-Muwatta 715/1 Ibn Hibban 280/3 Ibn Majah 3885 Al-Mu'jam Al-Kabir 12159
عن أبى هريرة رضى الله عنه قال قال رسول الله صلى الله عليه وسلم : إذا فرغ أحدكم من التشهد الآخر فليتعوذ بالله من أربع : من عذاب جهنم ، ومن عذاب القبر ، ومن فتنة المحيا والممات ، ومن شر المسيح الدجال
Hazrat Abu Huraira (may Allah be pleased with him) says that the Messenger of Allah (peace be upon him) said: When you finish the last Tashahhud (in prayer), seek refuge with Allah from four things:
➊ The punishment of the grave
➋ The punishment of Hell
➌ The trials of life and death
➍ And the evil (trial) of the Messiah Dajjal.
Reference: Muslim: Book of Mosques: Chapter on the Recommendation to Seek Refuge from the Punishment of the Grave 588
It is narrated from Hazrat Abdullah bin Abbas (may Allah be pleased with them) that indeed the Noble Prophet (peace be upon him) used to seek refuge from four things at the end of the prayer (according to some narrations at the end of Tashahhud):
➊ O my Lord! I seek refuge from the punishment of the grave
➋ The punishment of Hell
➌ The outward and inward (trials of life and death)
➍ And from the blind, the lame, the false (Messiah Dajjal).
Reference: Ahmad 201/1, 313, 370, 386
Hazrat Aisha (may Allah be pleased with her) says that the Noble Prophet (peace be upon him) used to often supplicate: O Allah! I seek refuge in You from the trial and punishment of the Fire. O my Lord! I seek refuge in You from the trial and punishment of the grave, from the trials of wealth and poverty. O Allah! I seek refuge in You from the worst trial of the Messiah Dajjal.
Reference: Bukhari: Book of Supplications: Chapter on Seeking Refuge from the Trial of Poverty 6377
