Quran 2:54 from Surah Al-Baqara on Divine Marvels.
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
English translation: And when said Musa to his people O my people! Indeed you [you] have wronged yourselves by your taking the calf So turn in repentance to your Creator and kill yourselves That (is) better for you with your Creator Then He turned towards you Indeed He! He (is) the Oft-returning the Most Merciful
Transliteration: wa-idh qala musa liqawmihi yaqawmi innakum zalamtum anfusakum bi-ittikhadhikumu al-'ij'la fatubu ila bari-ikum fa-uq'tulu anfusakum dhalikum khayrun lakum inda bari-ikum fataba alaykum innahu huwa al-tawabu al-rahimu