Al-Ma'idah' - 5:47

وَلْيَحْكُمْ أَهْلُ الإِنجِيلِ بِمَا أَنزَلَ اللّهُ فِيهِ وَمَن لَّمْ يَحْكُم بِمَا أَنزَلَ اللّهُ فَأُوْلَـئِكَ هُمُ الْفَاسِقُونَ
[5:47]
And the followers of the Injeel should have judged by what Allah revealed in it; and whoever did not judge by what Allah revealed, those are they that are the transgressors.
Let the people of the Gospel judge by what Allah hath revealed therein. If any do fail to judge by (the light of) what Allah hath revealed, they are (no better than) those who rebel.
Let the People of the Gospel judge by that which Allah hath revealed therein. Whoso judgeth not by that which Allah hath revealed: such are evil-livers.