Abud-Darda' (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said: "Whoever commits to memory the first ten Ayat of the Surat Al-Kahf, will be protected from (the trial of) Ad-Dajjal (Antichrist)."[Muslim].In another narration, the Messenger of Allah (ﷺ) said: "(Whoever commits to memory) the last ten Ayat of Surat Al-Kahf, he will be protected from (the trial of) Ad-Dajjal (Antichrist)."
App reference: Book 9, Hadith 31
Arabic/English book reference: Book 9, Hadith 1021