Seeking forgiveness

اللَّهُمَّ أَنْتَ رَبِّي لَا إِلَٰهَ إِلَّا أَنْتَ، خَلَقْتَنِي وَأَنَا عَبْدُكَ، وَأَنَا عَلَى عَهْدِكَ وَوَعْدِكَ مَا اسْتَطَعْتُ

Allāhumma anta Rabbī lā ilāha illā anta, khalaqtanī wa anā ʿabduk, wa anā ʿalā ʿahdika wa waʿdika mā staṭaʿt

O Allah, You are my Lord, there is no god but You. You created me and I am Your servant; I keep to Your covenant as much as I can.

Source: Ṣaḥīḥ al-Bukhārī 6306 (Sayyid al-Istighfār)

رَبَّنَا ظَلَمْنَا أَنْفُسَنَا وَإِنْ لَمْ تَغْفِرْ لَنَا وَتَرْحَمْنَا لَنَكُونَنَّ مِنَ الْخَاسِرِينَ

Rabbanā ẓalamnā anfusanā wa in lam taghfir lanā wa tarḥamnā lanakūnanna mina l-khāsirīn

Our Lord, we have wronged ourselves; if You do not forgive us and have mercy on us, we shall surely be among the losers.

Source: Quran 7:23