The Quran

أَلَم تَرَ إِلَى الَّذينَ يَزعُمونَ أَنَّهُم آمَنوا بِما أُنزِلَ إِلَيكَ وَما أُنزِلَ مِن قَبلِكَ يُريدونَ أَن يَتَحاكَموا إِلَى الطّاغوتِ وَقَد أُمِروا أَن يَكفُروا بِهِ وَيُريدُ الشَّيطانُ أَن يُضِلَّهُم ضَلالًا بَعيدًا

(Saheeh International)

Have you not seen those who claim to have believed in what was revealed to you, [O Muḥammad], and what was revealed before you? They wish to refer legislation to ṭāghūt,¹ while they were commanded to reject it; and Satan wishes to lead them far astray.

False objects of worship or those transgressors who usurp the divine right of government.