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 بِذَنْبِي ، فَاغْفِرْ لِي فَإِنَّهُ لَا يَغْفِرُ الذُّنُوبَ إِلَّا أَنْتَ
Translation 
The Prophet said "The master supplication (most superior way) to ask for forgiveness from Allah is:
"O Allah, You are my Lord, none has the right to be worshipped except You, You created me and I am Your slave and I abide to Your covenant and promise as best as I can, I seek refuge with 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 sin except You."
(The prophet then) said: "If somebody says it during the day with firm faith in it, and dies on the same day before the evening, he will be from the people of Paradise; and if somebody says it at night with firm faith in it, and dies before the morning, he will be from the people of Paradise."
"O Allah, You are my Lord, none has the right to be worshipped except You, You created me and I am Your slave and I abide to Your covenant and promise as best as I can, I seek refuge with 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 sin except You."
(The prophet then) said: "If somebody says it during the day with firm faith in it, and dies on the same day before the evening, he will be from the people of Paradise; and if somebody says it at night with firm faith in it, and dies before the morning, he will be from the people of Paradise."
Transliteration
allaahumma anta rabbiy laa ilaaha illaa anta, khalaqtanee wa ana ‛abduka, wa ana ‛alaa ‛ahdika wa wa‛dika masta-ṭa‛tu a‛oodhu bika min sharri maa ṣana‛tu, aboo’u laka bi ni‛matika ‛alayya wa aboo’u bi dhambee, faghfir lee fa innahu laa yaghfir-udh-dhunooba illaa ant
