Abū Sa'id reported the Prophet as saying, “If anyone recites sūra al-Kahf (Qur’ān, 18) on Friday, light will shine brightly for him till the next Friday.”
Baihaqī transmitted it in [Kitāb] al-Da‘awāt al-kabir.
Mishkat al-Masabih 2175
https://sunnah.com/mishkat:2175
Abu Darda' reported Allah's Apostle (ﷺ) as saying: If anyone learns by heart the first ten verses of the Surah al-Kahf, he will be protected from the Dajjal.
Sahih Muslim 809a
https://sunnah.com/muslim:809a
(Antichrist).
