Many of us know the benefits of reading Surah al-Kahf on Friday and try to recite it regularly.
• Al-Bara’ said: “A man recited Al-Kahf and there was an animal in the house which began acting in a nervous manner. He looked, and saw a fog or cloud overhead.
He mentioned this to the Prophet ﷺ who said:
اقْرَأْ فُلَنُ، فَإِنَّهَا السَّكِينَةُ تَنْزِلُ عِنْدَ الْقُرْآنِ أَوْ تَنَزَّلَتْ لِلْقُرْآن
“Keep on reciting so and so, for this is the tranquility which descends when one reads Quran or because of reading Quran.” [Al-Bukhari & Muslim]
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• The Prophet ﷺ said:
مَنْ حَفِظَ عَشْرَ آيَاتٍ مِنْ أَوَّلِ سُورَةِ الْكَهْفِ عُصِمَ مِنَ الدَّجَّال
“Whoever memorizes ten Ayat from the beginning of Surat Al- Kahf will be protected from the Dajjal.” [Sahih Muslim and others]
According to the version recorded by At-Tirmidhi: « مَنْ حَفِظَ ثَلَثَ آيَاتٍ مِنْ أَوَّلِ الْكَهْف » “Whoever memorizes three Ayat from the beginning of Al-Kahf.” [Hasan Sahih]
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• In Mustadrak, Al-Hakim recorded, the Prophet ﷺ said:
مَنْ قَرَأَ سُورَةَ الْكَهْفِ فِي يَوْمِ الُْمُعَةِ أَضَاءَ لَهُ مِنَ النُّورِ مَا بَيْنَهُ وَبَيَْ الُْمُعَتَيْ
“Whoever recites Surat Al-Kahf on Friday, it will illuminate him with light from one Friday to the next.”
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• Al-Bayhaqi also recorded it in his Sunan from Al-Hakim, then he narrated with his own chain that the Prophet ﷺ said:
مَنْ قَرَأَ سُورَةَ الْكَهْفِ كَمَا نَزَلَتْ، كَانَتْ لَهُ نُورًا يَوْمَ الْقِيَامَة
“Whoever recites Surat Al-Kahf as it was revealed, it will be a light for him on the Day of Resurrection.”
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 The man who recited it was the companion Usayd bin Al-Hudayr.
 Then he said: “This Hadith has a Sahih chain, but they (Al-Bukhari and Muslim) did not record it.”