Ibn Abbas (ra) narrates that the Messenger if Allah ﷺ said,
“I have found in the Book of Allah a Surah (Chapter) thirty passages long; whoever reads it when he sleeps thirty good deeds are written for him; thirty wrong actions are omitted and he is raised thirty degrees.
Allah sends an angel to spread his wings over him and protect him from everything until he wakes up. It is the disputer who argues for its reader in the grave and it is Tabarak alldhi biyadihi l-Mulku.” (Surah al Mulk)
[Ad-Daylami]