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." (RU)
English reference (RU): Vol. 5, Book 42, Hadith 2886 (RU)
Arabic reference (RU): Book 45, Hadith 3127 (RU)