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