The Table Spread - 5:82
"Among mankind you will find the Jews and the polytheists the worst enemies of the believers. And closest in love to the believers are those who say: "We are Christians". For among them are priests and monks who are not arrogant."
Related:
The Iron/57:27
Then We sent Our messengers after them, one after another. We also sent Jesus the son of Mary and gave him the Gospel, and We put compassion and mercy in the hearts of those who followed him. But they invented for themselves a spirituality which We did not approve of them. Whereas We had asked them to follow only that which would please Allah. And they did not observe it properly. We gave the believers among them their reward, but many of them were astray.