Narrated Abu Ad-Darda:
that the Prophet (ﷺ) said: "Whoever recites three Ayat from the beginning of Al-Kahf he is protected from the turmoil of the Dajjal." (AR)
English reference (AR): Vol. 5, Book 42, Hadith 2886 (AR)
Arabic reference (AR): Book 45, Hadith 3127 (AR)