Surah Al-Baqarah, Verse 54

وَإِذۡ قَالَ مُوسَىٰ لِقَوۡمِهِۦ يَٰقَوۡمِ إِنَّكُمۡ ظَلَمۡتُمۡ أَنفُسَكُم بِٱتِّخَاذِكُمُ ٱلۡعِجۡلَ فَتُوبُوٓاْ إِلَىٰ بَارِئِكُمۡ فَٱقۡتُلُوٓاْ أَنفُسَكُمۡ ذَٰلِكُمۡ خَيۡرٞ لَّكُمۡ عِندَ بَارِئِكُمۡ فَتَابَ عَلَيۡكُمۡۚ إِنَّهُۥ هُوَ ٱلتَّوَّابُ ٱلرَّحِيمُ٥٤

wa-idh qāla mūsā liqawmihi yāqawmi innakum ẓalamtum anfusakum bi-ittikhādhikumu l-ʿij'la fatūbū ilā bāri-ikum fa-uq'tulū anfusakum dhālikum khayrun lakum ʿinda bāri-ikum fatāba ʿalaykum innahu huwa l-tawābu l-raḥīmu

And [recall] when Moses said to his people, "O my people, indeed you have wronged yourselves by your taking of the calf [for worship]. So repent to your Creator and kill yourselves [i.e., the guilty among you]. That is best for [all of] you in the sight of your Creator." Then He accepted your repentance; indeed, He is the Accepting of Repentance, the Merciful.