Abu Hurairah (May Allaah be pleased with him) reported:

I heard the Messenger of Allah (Sallallaahu ‘alaihi wasallam) 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]