There is a hadith in Sahih Muslim that states that Muhammad said (Concerning The False Messiah, Ad-Dajjal):
"He who amongst you would survive to see him should recite over him the opening verses of Sura Kahf"
—Sahih Muslim, Book 41, Number 7015
"Whoever reads Sura Kahf on Friday, light shall shine forth for him between the two Fridays."
Recitation byQari Abdul Basit 'Abd us-Samad r a (1927--1988) (عبد الباسط عبد الصمد), may Allah have mercy on him.
Sura al-Kahf "The Cave" (Arabic: سورة الكهف, Sūratu al-Kahf) is the 18th surah of the Qur'an with 110 ayat. It is a Meccan sura.
People of the Cave
Verses 9 -- 26 of the chapter tell the story of the People of the Cave (Ashabu Al-Kahf). Some number of young monotheistic men lived in a time where they were persecuted. They fled the city together, and took refuge in a cave where they fell asleep. God caused them to remain sleeping for 300 solar years, or 309 lunar years, and when they woke the surrounding area had become monotheistic as well.
The story of the rich and the poor
In verses 32 -- 44 the surah discusses a Parable of two men, who one of them had been given blessings from God and the other was poor. The rich one wronged his soul and started showing off with his wealth and noble lineage.
And he had fruit, so he said to his companion while he was conversing with him, "I am greater than you in wealth and mightier in [numbers of] men."
—Quran, Al-Kahf (The Cave), Ayah 34
At the end of the parable God destroys what he had given the man.
Moses and Al-Khidr
The third main story within the chapter (verses 60 -- 82) is that of Moses traveling to gain knowledge from another servant of God who is never mentioned by name, but according to the tafsir of ibn Kathir is called Al-Khidr.
Finally, the surah mentions in verses 83 -- 98 a man who traveled a great deal and reached the east and the west of the earth -- namely, Dhul-Qarnayn.