Why we should read this surah before going to sleep every night?
We read in a hadith that reading Surah al-Mulk will protect us:
“It was narrated that Abdullah Ibn Masud said: Whoever reads Tabaarak allaahi bi yadihi’l-mulk [i.e., Surat al-Mulk] every night, Allah will protect him from the torment of the grave. At the time of the Messenger of Allah (SAW) we used to call it al-maani’ah (that which protects). In the Holy Qur’an it is a Surah which, whoever recites it every night has done very well.” (Al-Nasai)