Sayyiduna Abu Hurairah (may Allah be pleased with him) narrated from the Messenger of Allah (peace and blessings be upon him), he (peace be upon him) said: "There is a surah in the Qur'an of thirty verses, it interceded for its reciter until he was forgiven; that surah is Surah Al-Mulk."
Hadith Referenceمسند اسحاق بن راهويه / كتاب فضائل القرآن / 572
Hadith Takhrij«سنن ابوداود ، كتاب الصلاة ، باب فى عدد الاي ، رقم : 1400 . سنن ترمذي ، ابواب فضائل القرآن ، باب فضل سورة الملك ، رقم : 2891 . قال الشيخ الالباني : حسن ، مسند احمد : 299/2 .»
Explanation & Benefits
Hafiz Abdush Shakoor Tirmidhi
Benefits: From the mentioned hadith, the virtue of reciting Surah al-Mulk is established, that it interceded for its reciter and he was forgiven. In one hadith, the words are: ((تَشْفَعُلِصَاحِبِهَا))... “It will intercede for its companion (the one who recites it).” ((حَتّٰیغُفِرَلَهٗ))... “Until he is forgiven.” (Sunan Abi Dawud, No. 1400)
In another hadith, it is narrated that Sayyiduna Anas radi Allahu anhu said that the Messenger of Allah sallallahu alayhi wa sallam said: “There is a surah of thirty verses which will argue with Allah on the Day of Resurrection for the forgiveness of its reciter, until he is admitted into Paradise.” (Sahih al-Jami‘ al-Saghir, No. 3538)
Therefore, this surah should be recited every night before sleeping, as is narrated from Sayyiduna Jabir radi Allahu anhu: The Messenger of Allah sallallahu alayhi wa sallam would not sleep until he had recited Surah alif-lam-mim tanzeel (al-Sajdah) and Surah tabarak alladhi (al-Mulk). (Sunan al-Tirmidhi, Chapters on the Virtues of the Qur’an, Chapter: What Has Been Related About Surah al-Mulk)