Al-Baqarah 2:54

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 ٱلرَّحِيمُ 54

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. 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