اَللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ، فَتَقَبَّلْ مِنِّي إِنَّكَ أَنْتَ السَّمِيعُ الْعَلِيمُ
Transliteration
Allahumma laka sumtu wa 'ala rizqika aftartu, fa taqabbal minni innaka antas-sami'ul-'alim
English meaning
O Allah, for You I fasted and upon Your provision I have broken my fast. Accept from me. Indeed, You are the All-Hearing, the All-Knowing.
When is it recited?
At iftar time, when breaking the fast.
Source
Daraqutni II/185
