رَبَّنَا آمَنَّا فَاغْفِرْ لَنَا وَارْحَمْنَا وَأَنتَ خَيْرُ الرَّاحِمِينَ
Translation 
"Our Lord! We believe, so forgive us, and have mercy on us, for You are the Best of all who show mercy!"
Transliteration
rabbanaa aamannaa faghfir lanaa war-ḥamnaa wa anta khayr-ur-raaḥimeen
Sources:
Surah Al-Mu'minoon (23:109)
