Idolatry and Deviation from Monotheism

قَالَ فَإِنَّا قَدْ فَتَنَّا قَوْمَكَ مِنۢ بَعْدِكَ وَأَضَلَّهُمُ ٱلسَّامِرِىُّ

[Allāh] said, "But indeed, We have tried your people after you [departed], and the Sāmirī has led them astray."