that the Prophet (ﷺ) said: "Whoever recites three Ayat from the beginning of Al-Kahf he is protected from the turmoil of the Dajjal."
Jami` at-Tirmidhi Book 45, Hadith 12
← Previous Hadith hearing Al-Bara say: "There was a man reciting Al-Kahf when he saw his riding animal stamping his feet, so he looked and there was something like a shadow or cloud, so he went to the Messenger of Allah (ﷺ) and mentioned that to him. The Prophet (ﷺ) said: "That was the tranquility which descends with the Qur'an, or descends because of the Qur'an."

Jami` at-Tirmidhi Book 45, Hadith 11 Next Hadith → that the Messenger of Allah (ﷺ) said: "Indeed for everything there is a heart, and the Qur'an's heart is Ya Sin. Whoever recites Ya Sin, then for its recitation, Allah writes for him that he recited the Qur'an ten times."

Jami` at-Tirmidhi Book 45, Hadith 13