Brothers can you please confirm this, i have recently found out that memorizing surat al mulk and reciting it every night will save us from the grave torture, what ahadith is there to support this my brothers and sisters?
The narration it mentions is a saying of Abdullah bin Masoud and not the Prophets. It goes as follows, Abdullah bin Masoud said =
من قرأ تبارك الذي بيده الملك كل ليلة منعه الله بها من عذاب القبر
"Whoever reads 'Tabaraka allathee biyadihialmulk' every night, Allah will protect him from the torment of the grave..."
Recorded in Sunan alKubra of Imam an-Nasai and it's not a saying of the Prophet and it's inauthentic anyways.
Two narrators are problematic. First is عرفجة بن عبد الواحد who was not known to report hadith and any narrations related to him weren't taken unless there were other authentic ones to back him up.
Second problem is عاصم بن بهدلة who was a pious person and a reciter of the Quran. Yet, in hadith he wasn't strong and made mistakes. But even if his reports are accepted, عرفجة بن عبد الواحد aren't.
There are similar hadiths attributed to the Prophet =
إِنَّ سُورَةً مِنَ الْقُرْآنِ ثَلاَثُونَ آيَةً شَفَعَتْ لِرَجُلٍ حَتَّى غُفِرَ لَهُ وَهِيَ سُورَةُ تَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ
"Indeed there's a Surah in the Quran of thirty verses, which intercedes for a man until he's forgiven. It is 'Tabaraka allathee biyadihialmulk'"
Recorded in Musnad Ahmed and Jami atTirmidhi both have the same reporters. However it's also weak because of the ambiguity (tadlis) of Qatadah and obscurity of Abbas alJoshami.
So, neither of these two ahadith can be taken to be solid and are considered suspicious.