﴿ ٱلَّذِينَ يَجْعَلُونَ مَعَ ٱللَّهِ إِلَٰهًا ءَاخَرَ ۚ فَسَوْفَ يَعْلَمُونَ ﴾

“who assert that there are, side by side with God, other divine powers as well: for in time they will come to know [the truth].”

Please check ayah 15:99 for complete tafsir.