Reciting Surah Kahf will protect a person from Dajjal. Is this specific to Friday or any day?
The following Hadith recorded in Sahih Muslim is general and not specific to a Friday:
Sayyiduna Abu Darda (radiyallahu ‘anhu) reports that Nabi (sallallahu ‘alayhi wa sallam) said, “Whomsoever memorises the first ten verses of Surah Kahf, will be saved from the trial of Dajjal.”
However, there is a narration recorded in Al Ahadithul Mukhtarah of Imam Diya-ud Din Al Maqdisi (rahimahullah) which specifies Friday.
Sayyiduna ‘Ali (radiyallahu ‘anhu) reports that Nabi (sallallahu ‘alayhi wa sallam) said: “Whomsoever recited Surah Kahf on Friday will be protected for the (next) eight days from all trials. If Dajjal were to emerge (during those eight days), he would be protected from him.”
(Al Ahadithul Mukhtarah, Hadith: 430)
Imam ‘Abdul Haq Al Ishbili (rahimahullah) has graded this chain weak (سنده مجهول). Imam Diya-ud Din Al Maqdisi (rahimahullah) has also alluded to this.
However, ‘Allamah Zabidi (rahimahullah) has cited corroborating narrations. The Hadith which specifies Friday, is therefore also suitable to quote.
(Refer: Ithafus Sadah Al Muttaqin, vol. 3 pg. 292)
And Allah Ta’ala Knows best.
Answered by: Moulana Suhail Motala