Surah Al-Baqarah, Verse 51

وَإِذۡ وَٰعَدۡنَا مُوسَىٰٓ أَرۡبَعِينَ لَيۡلَةٗ ثُمَّ ٱتَّخَذۡتُمُ ٱلۡعِجۡلَ مِنۢ بَعۡدِهِۦ وَأَنتُمۡ ظَٰلِمُونَ٥١

wa-idh wāʿadnā mūsā arbaʿīna laylatan thumma ittakhadhtumu l-ʿij'la min baʿdihi wa-antum ẓālimūna

And [recall] when We made an appointment with Moses for forty nights. Then you took [for worship] the calf after him [i.e., his departure], while you were wrongdoers.