It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that a person is approached in his grave (for punishment) from the side of his feet, and his feet say: You have no way through my side, for he used to recite Surah al-Mulk with me. Then he is approached from the side of his chest (or his stomach), and it says: You have no way through my side, for he used to recite Surah al-Mulk with me. Then he is approached from the side of his head, and it says: You have no way through my side, for he used to recite Surah al-Mulk with me. He said: So this surah is the one that protects from the punishment of the grave, and in the Torah too its name is Surah al-Mulk. Whoever recites it in a night has done a great deal and done well. This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.