The Prophet ﷺ said: A surah of the Qur'an containing thirty verses will intercede its reader till he will be forgiven. That is: "Blessed is He in Whose Hand is the sovereignty" (Surah 67).  

عَنِ النَّبِيِّ ﷺ قَالَ سُورَةٌ مِنَ الْقُرْآنِ ثَلاَثُونَ آيَةً تَشْفَعُ لِصَاحِبِهَا حَتَّى يُغْفَرَ لَهُ { تَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ }