Abū Huraira reported God’s messenger as saying, “A sūra in the Qur’ān containing thirty verses interceded for a man till his sins were forgiven. It was ‘Blessed is He in whose hand is the kingdom.'” (Qur’ān, 67)
Ahmad, Tirmidhī, Abū Dāwūd, Nasā’i and Ibn Mājah transmitted it.