Dua against Dajjal
Allahummah inni a’udhu bika min ‘adhabil Qabri, wa min ‘adhabi-naar, wa min fitnatil mahya wa-lmamat, wa min fitnatil masih ad-dajjal.
(O Allah! I seek refuge with you from the punishment in the grave and from the punishment in the Hell fire and from the afflictions of life and death, and the afflictions of Al-Masih Ad-Dajjal.”
[Sahih Al-Bukhari, 2.459]