﴿ وَإِذْ وَٰعَدْنَا مُوسَىٰٓ أَرْبَعِينَ لَيْلَةًۭ ثُمَّ ٱتَّخَذْتُمُ ٱلْعِجْلَ مِنۢ بَعْدِهِۦ وَأَنتُمْ ظَٰلِمُونَ ﴾

“and when We appointed for Moses forty nights [on Mount Sinai], and in his absence you took to worshipping the [golden] calf, and thus became evildoers:”

And when We appointed for wā‘adnā or wa‘adnā Moses forty nights at the end of which We shall give him the Torah for you to implement then you took to yourselves the calf the one which the Samaritan fashioned for you as a god after him that is after he departed for Our appointment and you were evildoers for taking it in worship because you directed your worship to the wrong place.