It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever recites Surah al-Kahf as it was revealed, it will be a light for him on the Day of Resurrection from where he stands to Makkah. Whoever recites the last ten verses of it and then the Dajjal emerges, he will not be given power over him. And whoever performs ablution and then says: 'Subhanaka Allahumma wa bihamdika, la ilaha illa anta, astaghfiruka wa atubu ilayk' (Glory be to You, O Allah, and with Your praise; there is no god but You; I seek Your forgiveness and turn to You in repentance), it is written on a sheet and then sealed with a seal that will not be broken until the Day of Resurrection." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it. Sufyan al-Thawri narrated it from Abu Hashim in mawquf form (as the Companion's own statement).

The same is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) in mawquf form (as has passed above).