If anyone learns by heart the first ten verses of the Surah al-Kahf, he will be protected from the Dajjal.
Sahih Muslim Book 6, Hadith 311
← Previous Hadith It is through another chain of transmitters that this hadith has been reported by Abu Mas'ud from the Messenger of Allah (ﷺ).

Sahih Muslim Book 6, Hadith 310 Next Hadith → At the end of Surah al-Kahf, but Hammam said: At the beginning of Surah al-Kahf.

Sahih Muslim Book 6, Hadith 312