Dua for Forgiveness
Repentance
رَبَّنَا ظَلَمْنَا أَنفُسَنَا وَإِن لَّمْ تَغْفِرْ لَنَا وَتَرْحَمْنَا لَنَكُونَنَّ مِنَ الْخَاسِرِينَ
Rabbanaa zalamnaa anfusanaa wa il-lam taghfir lanaa wa tarhamnaa lanakoonanna minal-khaasireen.
Our Lord, we have wronged ourselves — and if You do not forgive us and have mercy on us, we will surely be among the losers.
Source: Quran 7:23 — the dua of Adam (AS)