اَللّهُمَّ إنَّكَ قُلْتَ فِي كِتابِكَ الْمُنْزَلِ:…
Source: Source: duas.org · ramadan-end-farewell
allahumma innaka qulta fiy kitabika almunzali: “shahru Ramadhana alladhiy unzila fihi alqur’anu.” wahadha shahru Ramadhana waqad tasarrama fasaluka biuajhika alkarimi wakalimatika alttammati in kana baqia `alayya dhanbun lam taghfirhu li aw turidu an tu`adhdhibaniy `alayhi aw tuqayisaniy bihi an la yatlu`a fajru hadhihii allaylati aw yatasarramu hdha alshshahru illa waqad ghafartahu li
O Allah: You have said in Your revealed Book: “The month of Ramadhan in which the Quran was revealed…” And this month of Ramadhan is about to slip away. I thus beseech You in the name of Your Noble Face, And Your Perfect Words, If I am still liable to a sin that You have not yet forgiven or You want to punish me for it, or to retaliate upon me because of it, (I beseech You that) before dawn of this night rises And before this moth elapses (please) forgive it for me;
Reference / Source
Source: duas.org · ramadan-end-farewell