And never say of anything, "Indeed, I will do that tomorrow,". There is a lot of reward in reciting Surah Kahf either before the jumu’ah salaat or after it. Rasulullah (Allah bless him & give him peace) said: “The person who recites Surah Kahf on Fridays, a nur will appear for him from below the arsh as high as the skies. This light will help him in the darkness of the day of resurrection . And all the sins which he may have committed from the last Friday till this Friday will be forgiven . ” (Sharh Sifrus-Sa’aadah) The ulama have written that this Hadith refers to minor sins because major sins are not forgiven without making taubah.