Surah Al-Baqarah, ayah 51

2:51

وَإِذۡ وَٰعَدۡنَا مُوسَىٰٓ أَرۡبَعِينَ لَيۡلَةٗ ثُمَّ ٱتَّخَذۡتُمُ ٱلۡعِجۡلَ مِنۢ بَعۡدِهِۦ وَأَنتُمۡ ظَٰلِمُونَ ٥١

Wa idh wā'adnā mūsā arba'īna laylatan thummat-takhadhtumul-'ijla mim ba'dihī wa antum zālimūn

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.