اللَّهُمَّ أَنْتَ رَبِّي، لَا إِلَهَ إِلَّا أَنْتَ، خَلَقْتَنِي وَأَنَا عَبْدُكَ، وَأَنَا عَلَى عَهْدِكَ وَوَعْدِكَ مَا اسْتَطَعْتُ، أَعُوذُ بِكَ مِنْ شَرِّ مَا صَنَعْتُ، أَبُوءُ لَكَ بِنِعْمَتِكَ عَلَيَّ وَأَبُوءُ لَكَ بِذَنْبِي، فَاغْفِرْ لِي، فَإِنَّهُ لَا يَغْفِرُ الذُّنُوبَ إِلَّا أَنْتَ
Allahumma anta rabbi, la ilaha illa ant. Khalaqtani wa ana 'abduk, wa ana 'ala 'ahdika wa wa'dika mastata't. A'udhu bika min sharri ma sana't. Abu'u laka bi ni'matika 'alayya, wa abu'u laka bi dhanbi, faghfir li, fa innahu la yaghfirudh-dhunuba illa ant.
O Allah, You are my Lord; there is no god but You. You created me and I am Your servant, and I hold to my covenant and promise to You as far as I am able. I seek Your protection from the harm of what I have done. I acknowledge Your favour upon me, and I acknowledge my sin, so forgive me, for none forgives sins but You.
The Prophet ﷺ said that whoever says it with conviction during the day and dies before evening, or during the night and dies before morning, is among the people of Paradise. For that reason many say it each morning and evening.