Al-Ma'idah' - 5:14

وَمِنَ الَّذِينَ قَالُواْ إِنَّا نَصَارَى أَخَذْنَا مِيثَاقَهُمْ فَنَسُواْ حَظًّا مِّمَّا ذُكِّرُواْ بِهِ فَأَغْرَيْنَا بَيْنَهُمُ الْعَدَاوَةَ وَالْبَغْضَاء إِلَى يَوْمِ الْقِيَامَةِ وَسَوْفَ يُنَبِّئُهُمُ اللّهُ بِمَا كَانُواْ يَصْنَعُونَ
[5:14]
And with those who say, We are Christians, We made a covenant, but they neglected a portion of what they were reminded of, therefore We excited among them enmity and hatred to the day of resurrection; and Allah will inform them of what they did.
From those, too, who call themselves Christians, We did take a covenant, but they forgot a good part of the message that was sent them: so we estranged them, with enmity and hatred between the one and the other, to the day of judgment. And soon will Allah show them what it is they have done.
And with those who say: "Lo! we are Christians," We made a covenant, but they forgot a part of that whereof they were admonished. Therefor We have stirred up enmity and hatred among them till the Day of Resurrection, when Allah will inform them of their handiwork.