At-Taubah - 9:31

اتَّخَذُواْ أَحْبَارَهُمْ وَرُهْبَانَهُمْ أَرْبَابًا مِّن دُونِ اللّهِ وَالْمَسِيحَ ابْنَ مَرْيَمَ وَمَا أُمِرُواْ إِلاَّ لِيَعْبُدُواْ إِلَـهًا وَاحِدًا لاَّ إِلَـهَ إِلاَّ هُوَ سُبْحَانَهُ عَمَّا يُشْرِكُونَ
[9:31]
They have taken their doctors of law and their monks for lords besides Allah, and (also) the Messiah son of Marium and they were enjoined that they should serve one Allah only, there is no god but He; far from His glory be what they set up (with Him).
They take their priests and their anchorites to be their lords in derogation of Allah, and (they take as their Lord) Christ the son of Mary; yet they were commanded to worship but One Allah: there is no god but He. Praise and glory to Him: (Far is He) from having the partners they associate (with Him).
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)!