Surah Ali 'Imran 3:16

ٱلَّذِينَ يَقُولُونَ رَبَّنَآ إِنَّنَآ ءَامَنَّا فَٱغْفِرْ لَنَا ذُنُوبَنَا وَقِنَا عَذَابَ ٱلنَّارِ

Those who say, "Our Lord, indeed we have believed, so forgive us our sins and protect us from the punishment of the Fire,"

Translation: Saheeh International

Tafsir

Those alladhīna is either an adjectival qualification of or a substitution for the previous alladhīna who say “O Our Lord we believe in You and in Your Prophet; so forgive us our sins and guard us from the chastisement of the Fire”.

Excerpt from Tafsir al-Jalalayn, commentary on 3:16, via Quran.com. The reader has the full commentary and 9 more tafsirs.