Idolatry and shirk (polytheism)

وَإِذْ وَٰعَدْنَا مُوسَىٰٓ أَرْبَعِينَ لَيْلَةً ثُمَّ ٱتَّخَذْتُمُ ٱلْعِجْلَ مِنۢ بَعْدِهِۦ وَأَنتُمْ ظَـٰلِمُونَ

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.

۞ وَلَقَدْ جَآءَكُم مُّوسَىٰ بِٱلْبَيِّنَـٰتِ ثُمَّ ٱتَّخَذْتُمُ ٱلْعِجْلَ مِنۢ بَعْدِهِۦ وَأَنتُمْ ظَـٰلِمُونَ

And Moses had certainly brought you clear proofs. Then you took the calf [in worship] after that, while you were wrongdoers.

فَأَخْرَجَ لَهُمْ عِجْلًا جَسَدًا لَّهُۥ خُوَارٌ فَقَالُوا۟ هَـٰذَآ إِلَـٰهُكُمْ وَإِلَـٰهُ مُوسَىٰ فَنَسِىَ

And he extracted for them [the statue of] a calf which had a lowing sound, and they said, "This is your god and the god of Moses, but he forgot."