1. Before sleeping — the Prophet’s ﷺ own practice
كَانَ لاَ يَنَامُ حَتَّى يَقْرَأَ الم تَنْزِيلُ وَتَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ
Jābir reported that the Prophet ﷺ would not sleep until he had recited “Alif Lām Mīm, Tanzīl…” (Surah as-Sajdah, 32) and “Tabārak alladhī biyadihil-mulk” (Surah al-Mulk, 67).
Reference: Jāmiʿ at-Tirmidhī 2892, Jāmiʿ at-Tirmidhī 3404, al-Adab al-Mufrad 1209; Sunan ad-Dārimī 3316 (per sunnah.com). Ṣaḥīḥ (through supporting chains) — al-Albānī (as-Silsilah aṣ-Ṣaḥīḥah 585). Full grading and chain notes.
So the surest way to follow the Sunnah is to make Surah al-Mulk — with Surah as-Sajdah (chapter 32) — part of going to bed. As-Sajdah is in juz 21; it has 30 verses too.
2. Every night — the teaching of Ibn Masʿūd
Ibn Masʿūd said: “Whoever recites Tabārak alladhī biyadihil-mulk every night, Allah will protect him by it from the punishment of the grave. In the time of the Messenger of Allah ﷺ we used to call it al-Māniʿah (the protector). It is a surah in the Book of Allah: whoever recites it every night has done much, and done well.”
Reference: an-Nasāʾī, as-Sunan al-Kubrā (and ʿAmal al-Yawm wal-Laylah). Ḥasan — al-Albānī (Ṣaḥīḥ at-Targhīb wat-Tarhīb). These are a Companion’s words.
The promise of protection from the punishment of the grave is tied here to regularity — “every night” — rather than to a single reading.
What the narrations do not say
- No exact hour. They say “before sleeping” and “every night”. Any time you recite it at night, and especially before sleep, falls within them.
- No number of repetitions. They describe reciting it each night; they do not ask for it to be repeated.
- No particular prayer. None of the narrations collected on this site ties the surah to a specific prayer. It may of course be recited in any prayer, like any part of the Quran.
Practical points
- Reading counts. Reciting from a mushaf or a screen is recitation; you do not have to know it by heart. If you want to, follow the 30-day plan.
- It takes a few minutes. It is 30 short-to-medium verses. Use the reader with a reciter at first, and slow the speed if you are learning.
- Understand it. Scholars explain the promise belongs to the one who believes in the surah and lives by it. Read its meaning.