Best dua protection from all harms

 قُل يا عِبادِيَ الَّذينَ

 أَسرَفوا عَلى أَنفُسِهِم لا تَقنَطوا مِن رَحمَةِ اللَّهِ إِنَّ اللَّهَ يَغفِرُ الذُّنوبَ جَميعًا إِنَّهُ هُوَ الغَفورُ الرَّحيمُ

Say, "O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins (for those who repent and correct themselves), Indeed, it is He who is the Forgiving, the Merciful." (Surat Az-Zumar:53). ☝️