The virtue of reciting Surat al-Kahf on Friday
Question: What is the virtue of reciting Surat al-Kahf on the blessed day of Friday? Answer in the light of the Quran and hadith.
Answer: It is narrated from Abu Sa’id al-Khudri (may Allah be pleased with him) that the Prophet ﷺ said:
“Whoever recites Surat al-Kahf on the day of Friday, a light will shine for him between the two Fridays.”
In another hadith from the same narrator:
“Whoever recites Surat al-Kahf on the day of Friday, a light will shine for him between himself and the Sacred House (the Kaaba).”
Bayhaqi 249/3
Imam al-Hakim (may Allah have mercy on him) declared this hadith to be sahih (authentic) in its chain of narration, whereas Imam al-Dhahabi (may Allah have mercy on him) described Nu’aym ibn Hammad as “dhu manakir” (one who narrates rejected reports). Imam al-Dhahabi’s criticism is not correct, because Nu’aym is not alone in this narration. Yazid ibn Mukhallad and Sa’id ibn Mansur corroborated him. For further details, see Irwa al-Ghalil 626, 95/3, 96. From this sahih hadith it is known that by reciting Surat al-Kahf on the day of Friday, a light is made to shine for the period between the two Fridays, or a light is made to shine from that person up to the Sacred House.
Therefore, reciting it on the blessed day of Friday is entirely correct.