Sayyidul Istighfar (Master of Forgiveness)

سید الاستغفار
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 bini'matika 'alayya wa abu'u laka bidhanbi faghfir li fa innahu la yaghfirudh-dhunuba illa ant
O Allah, You are my Lord, none has the right to be worshipped except You. You created me and I am Your servant, and I abide to Your covenant and promise as best I can. I seek refuge in You from the evil of which I have committed. I acknowledge Your favour upon me, and I acknowledge my sin, so forgive me, for verily none can forgive sins except You.