The words Adam was taught, and by them he was forgiven.
رَبَّنَا ظَلَمْنَا أَنْفُسَنَا وَإِنْ لَمْ تَغْفِرْ لَنَا وَتَرْحَمْنَا لَنَكُونَنَّ مِنَ الْخَاسِرِينَ
Rabbanā ẓalamnā anfusanā wa in lam taghfir lanā wa tarḥamnā la-nakūnanna min al-khāsirīn
Our Lord, we have wronged ourselves. If You do not forgive us and have mercy on us, we will surely be among the losers.
Asks for forgiveness and for firmness after it.
رَبَّنَا اغْفِرْ لَنَا ذُنُوبَنَا وَإِسْرَافَنَا فِي أَمْرِنَا وَثَبِّتْ أَقْدَامَنَا وَانْصُرْنَا عَلَى الْقَوْمِ الْكَافِرِينَ
Rabbanā ighfir lanā dhunūbanā wa isrāfanā fī amrinā wa thabbit aqdāmanā wanṣurnā ʿalā al-qawmi al-kāfirīn
Our Lord, forgive us our sins and our excesses, make firm our footsteps, and give us victory over the disbelieving people.
The Prophet ﷺ said it more than seventy times a day.
أَسْتَغْفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ
Astaghfirullāha wa atūbu ilayh
I seek Allah's forgiveness and I turn to Him in repentance.
The Prophet ﷺ said he sought forgiveness more than seventy times a day.