At the end of Surah al-Kahf, but Hammam said: At the beginning of Surah al-Kahf.
Sahih Muslim Book 6, Hadith 312
← Previous Hadith If anyone learns by heart the first ten verses of the Surah al-Kahf, he will be protected from the Dajjal.

Sahih Muslim Book 6, Hadith 311 Next Hadith → Allah's Messenger (ﷺ) said: O Abu' al-Mundhir, do you know the verse from the Book of Allah which, according to you, is the greatest? I said: Allah and His Apostle (ﷺ) know best. He again said: Abu'l-Mundhir, do you know the verse from the Book of Allah which, according to you, is the greatest? I said: Allah, there is no god but He, the Living, the Eternal. Thereupon he struck me on my breast and said: May knowledge be pleasant for you, O Abu'l-Mundhir!

Sahih Muslim Book 6, Hadith 313