وَإِذْ وَاعَدْنَا مُوسَىٰ أَرْبَعِينَ لَيْلَةً ثُمَّ اتَّخَذْتُمُ الْعِجْلَ مِنْ بَعْدِهِ وَأَنْتُمْ ظَالِمُونَ 51
And remember We appointed forty nights for Moses, and in his absence ye took the calf (for worship), and ye did grievous wrong.