1. Allahumma anta Rabbi la ilaha illa anta, khalaqtani wa ana 'abduka, wa ana 'ala 'ahdika wa wa'dika mastata'tu
اللَّهُمَّ أَنْتَ رَبِّي لَا إِلَٰهَ إِلَّا أَنْتَ، خَلَقْتَنِي وَأَنَا عَبْدُكَ، وَأَنَا عَلَىٰ عَهْدِكَ وَوَعْدِكَ مَا اسْتَطَعْتُ
Allahumma anta Rabbi la ilaha illa anta, khalaqtani wa ana 'abduka, wa ana 'ala 'ahdika wa wa'dika mastata'tu
O Allah, You are my Lord. There is no deity but You. You created me and I am Your servant, and I abide by Your covenant and promise as best I can
The Master of Seeking Forgiveness. Whoever says it in the morning or evening with certainty and dies that day enters Paradise. (Bukhari)
Source: Bukhari 6306
2. Astaghfirullaha wa atubu ilayh
أَسْتَغْفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ
Astaghfirullaha wa atubu ilayh
I seek forgiveness from Allah and repent to Him
The Prophet ﷺ used to say this 70-100 times a day. A constant return to Allah. (Bukhari)
Source: Bukhari 6307
3. La ilaha illa anta subhanaka inni kuntu minaz-zalimin
لَّا إِلَٰهَ إِلَّا أَنتَ سُبْحَانَكَ إِنِّي كُنتُ مِنَ الظَّالِمِينَ
La ilaha illa anta subhanaka inni kuntu minaz-zalimin
There is no deity except You; exalted are You. Indeed, I have been of the wrongdoers
The dua of Yunus (AS) from inside the whale. No Muslim calls upon Allah with it except that Allah responds. (Tirmidhi)
Source: Quran 21:87