Surah al-Mulk intercedes
إِنَّ سُورَةً مِنَ الْقُرْآنِ ثَلَاثُونَ آيَةً شَفَعَتْ لِرَجُلٍ حَتَّى غُفِرَ لَهُ، وَهِيَ سُورَةُ تَبَارَكَ الَّذِي بِيَدِهِ الْمُلْكُ
Inna suratan mina-l-qur'ani thalathuna ayatin shafa'at li-rajulin hatta ghufira lah, wa hiya suratu Tabaraka-lladhi bi-yadihi-l-mulk.
"Indeed, there is a chapter in the Qur'an of thirty verses that interceded for a man until he was forgiven: Surah Tabaraka."
Narrated by Abu Hurayrah. Sunan at-Tirmidhi 2891, Sunan Abi Dawud 1400
A short reflection
The Sahaba memorised it as al-Munjiyah, the Saviour. The Prophet ﷺ would recite it before bed. Thirty verses, less than ten minutes, set against your account.