that the Prophet ﷺ said: "Indeed there is a Surah in the Qur'an of thirty Ayat, which intercedes for a man until he is forgiven. It is [Surah] Tabarak Alladhi Biyadihil-Mulk."
عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ سُورَةً مِنَ الْقُرْآنِ ثَلاَثُونَ آيَةً شَفَعَتْ لِرَجُلٍ حَتَّى غُفِرَ لَهُ وَهِيَ سُورَةُ تَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ هَذَا حَدِيثٌ حَسَنٌ