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). (Using translation from Abū Dāʾūd 1400)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ إِنَّ سُورَةً مِنَ الْقُرْآنِ ثَلَاثُونَ آيَةً شَفَعَتْ لِرَجُلٍ حَتَّى غُفِرَ لَهُ وَهِيَ {تَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ} [الملك 1]