Hadith: Abu Hurairah reported that the Prophet (peace be upon him) said: "There is a surah in the Quran which contains thirty verses that will intercede for its recipient until he is forgiven. It is [Surah] Tabarak Alladhi Biyadihil-Mulk." (Tirmidhi)
This hadith emphasizes the powerful intercession of Surah Mulk on the Day of Judgment. By reciting this surah regularly, believers can gain a strong advocate who will plead for their forgiveness before Allah.