Sura 2 Al-Baqarah (The Cow), aya 51

1. وَإِذْ وَاعَدْنَا مُوسَىٰ أَرْبَعِينَ لَيْلَةً ثُمَّ اتَّخَذْتُمُ الْعِجْلَ مِنْ بَعْدِهِ وَأَنْتُمْ ظَالِمُونَ

   And (recall) when We made an appointment with Moses for forty nights. Then you took (for worship) the calf after him, while you were wrongdoers.

   2:51

Tafsiri: Saheeh International