The Believers
إِنَّهُۥ كَانَ فَرِيقٌ مِّنْ عِبَادِى يَقُولُونَ رَبَّنَآ ءَامَنَّا فَٱغْفِرْ لَنَا وَٱرْحَمْنَا وَأَنتَ خَيْرُ ٱلرَّٰحِمِينَ
Indeed, there was a party of My servants who said, 'Our Lord, we have believed, so forgive us and have mercy upon us, and You are the best of the merciful.'
Nearby ayahs help place verse 23:109 in sequence and meaning.
رَبَّنَآ أَخْرِجْنَا مِنْهَا فَإِنْ عُدْنَا فَإِنَّا ظَـٰلِمُونَ
Our Lord, remove us from it, and if we were to return [to evil], we would indeed be wrongdoers."
قَالَ ٱخْسَـُٔوا۟ فِيهَا وَلَا تُكَلِّمُونِ
He will say, "Remain despised therein and do not speak to Me.
فَٱتَّخَذْتُمُوهُمْ سِخْرِيًّا حَتَّىٰٓ أَنسَوْكُمْ ذِكْرِى وَكُنتُم مِّنْهُمْ تَضْحَكُونَ
But you took them in mockery to the point that they made you forget My remembrance, and you used to laugh at them.
إِنِّى جَزَيْتُهُمُ ٱلْيَوْمَ بِمَا صَبَرُوٓا۟ أَنَّهُمْ هُمُ ٱلْفَآئِزُونَ
Indeed, I have rewarded them this Day for their patient endurance - that they are the attainers [of success]."