Virtues of Surat al-Mulk
The Prophet (sal Allahu alaihi wa sallam) said: “A surah from the Qur’an containing thirty verses will intercede for a man so that he will be forgiven. It is the surah Tabaarak Alathi bi yadihi’l-mulk [Blessed is He in Whose Hand is the dominion] (i.e., Surat al-Mulk).”
[Sunan al-Tirmidhi, Abu Dawood, and Ibn Maajah, Al-Tirmidhi said, this is a hasan hadeeth. It was classed as saheeh by Shaykh al-Islam Ibn Taymiyah in Majmoo’ al-Fataawa, 22/277, and by Shaykh al-Albaani in Saheeh Ibn Maajah, 3053]
What is meant by the above Hadith is that a person should read it regularly, act in accordance with the rulings contained in it, and believe in the information mentioned in it.
The scholars of the Standing Committee said:
On this basis (of the above Hadith) there is the hope that whoever believes in this surah and reads it regularly, seeking the pleasure of Allah, learning the lessons contained in it and acting in accordance with the rulings contained therein, it will intercede for him [in the Hereafter]. [Fataawa al-Lajnah al-Daa’imah, 4/334, 335]
And Allah knows best.