أَعُوذُ بِجَلالِ وَجْهِكَ الكَرِيمِ أَنْ يَنْقَضِيَ…
Source: Source: duas.org · ramadan-dua-last-10-nights
a`udhu bijalali wajhika alkarimi an yanqadhiya `anni shahru ramadhana aw yathlu`a alfajru min laylaty hadhihi wa laka qibaly tabi`atun aw dhanbun tu`adhdhibuny `alayhi
I seek the protection of the Majesty of Your Honorable Face against that the month of Ramadhan elapses Or dawn puts an end to this night but there is still an offense or a sin for which I am still liable and for which You will punish me.
Reference / Source
Source: duas.org · ramadan-dua-last-10-nights