Intention for fasting
Wa bisawmi ghadin nawaytu min shahri Ramadhan
"I intend to keep the fast tomorrow in the month of Ramadhan."
Completing the Fast Du'a
Allahumma laka sumtu wa 'ala rizqika aftartu
"O Allah! For You I have fasted and by what (food) You have blessed me with, have I broken it."