Abu Hurairah (May Allah be pleased with him) reported: I heard the Messenger of Allah (Peace be upon him) saying, “There is a Surah in the Qur’an which contains thirty Ayat which kept interceding for a man until his sins are forgiven. This Surah is `Blessed is He in Whose Hand is the dominion.’ (Surat Al-Mulk 67).”
[At-Tirmidhi and Abu Dawud].