It was narrated that Ibn ‘Umar (may Allaah be pleased with him) said:
“The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘Whoever reads Surah al-Kahf on the day of Jumu’ah, a light will shine for him from beneath his feet to the clouds of the sky, which will shine for him on the Day of Resurrection, and he will be forgiven (his sins) between the two Fridays.’”
(al-Targheeb wa’l-Tarheeb, 1/298)
Al-Mundhiri said, this was narrated by Abu Bakr ibn Mardawayh in his Tafseer, with an isnaad with which there was nothing wrong.
Shaykh Muhammad bin Saalih al-Uthaymeen (rahimullaah) said:
The recitation of Surah Al-Kahf on Friday is a preferred act and there is merit in it. And there is no difference between a person reciting it from the Book or by heart. And the day, according to the Islamic law is from the time of the sunrise until sunset. Based upon this, if a person recites it after the Friday prayer, he will receive the reward for it.
Fatawa Islamiyah (Vol.2, pg.477)
