once
رَبَّنَا آمَنَّا فَاغْفِرْ لَنَا وَارْحَمْنَا وَأَنتَ خَيْرُ الرَّاحِمِينَ
Meaning
«Our Lord, we have believed, so forgive us and have mercy upon us, and You are the best of the merciful»
Source and references
23:109The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Supplications from the Quran. Open source ↗