نَوَيْتُ صَوْمَ غَدٍ عَنْ أَدَاءِ فَرْضِ شَهْرِ رَمَضَانَ هذِهِ السَّنَةِ لِلّهِ تَعَالَى
Transliteration
Nawaitu sawma ghadin ʿan adaʼi fardi shahri Ramadāna hādhihi al-sanati lillāhi taʿalā
Translation
I intend to fast tomorrow to fulfill the obligation of the month of Ramadan this year for the sake of Allah the Exalted.
When to Recite
Recite this duʼa at Suhoor (pre-dawn meal) before Imsak time, making your intention to fast for the day.