Mukhtasar Muslim

Narrated from Sayyiduna Abu Darda (may Allah be pleased with him) that the Noble Prophet Muhammad (peace and blessings be upon him) said: Whoever memorizes the first ten verses of Surah Al-Kahf will be protected from the trial of the Dajjal. In another narration, it is mentioned that (by memorizing) the last verses of Surah Al-Kahf, one will be granted refuge from the Dajjal.