﴿ هَٰٓؤُلَآءِ قَوْمُنَا ٱتَّخَذُوا۟ مِن دُونِهِۦٓ ءَالِهَةًۭ ۖ لَّوْلَا يَأْتُونَ عَلَيْهِم بِسُلْطَٰنٍۭ بَيِّنٍۢ ۖ فَمَنْ أَظْلَمُ مِمَّنِ ٱفْتَرَىٰ عَلَى ٱللَّهِ كَذِبًۭا ﴾

“These people of ours have taken to worshipping [other] deities instead of Him, without being able to adduce any reasonable evidence in support of their beliefs; and who could be more wicked than he who invents a lie about God?”

Please check ayah 18:16 for complete tafsir.