Quran 9:31 At-Tawbah, ayah 31 of 129

ٱتَّخَذُوٓا۟ أَحْبَارَهُمْ وَرُهْبَـٰنَهُمْ أَرْبَابًا مِّن دُونِ ٱللَّهِ وَٱلْمَسِيحَ ٱبْنَ مَرْيَمَ وَمَآ أُمِرُوٓا۟ إِلَّا لِيَعْبُدُوٓا۟ إِلَـٰهًا وَٰحِدًا ۖ لَّآ إِلَـٰهَ إِلَّا هُوَ ۚ سُبْحَـٰنَهُۥ عَمَّا يُشْرِكُونَ ۝٣١

9:31 They have taken as lords beside Allah their rabbis and their monks and the Messiah son of Mary, when they were bidden to worship only One Allah. There is no Allah save Him. Be He Glorified from all that they ascribe as partner (unto Him)!