According to a narration of Sayyidna Abu al-Darda' ؓ appearing in Muslim, Abu Dawud, Tirmidhi, al-Nasa'i and the Musnad of Ahmad, one who has memorized the first ten verses of Surah al-Kahf will remain protected from the ill effects of Dajjal (imposter). In another report in the same books and from the same authority, the same thing has been said about having memorized the last ten verses of Surah al-Kahf.
