Surah Mulk is a very powerful Surah and we should try to read it every night InshAllah.

Hadith:

Abu Hurairah (RA) narrated that the Messenger of Allah (SWT) said: “Verily there is Surah of the Quran that contains thirty verses.  These verses will intercede on behalf of a man until he is forgiven. It (that Surah) is ‘Tabarakal-ladhi bi yadihil mulk’ (Surah Mulk).” – Ibn Majah Number 3786