Quran 5:14 Al-Ma'idah, ayah 14 of 120

وَمِنَ ٱلَّذِينَ قَالُوٓا۟ إِنَّا نَصَـٰرَىٰٓ أَخَذْنَا مِيثَـٰقَهُمْ فَنَسُوا۟ حَظًّا مِّمَّا ذُكِّرُوا۟ بِهِۦ فَأَغْرَيْنَا بَيْنَهُمُ ٱلْعَدَاوَةَ وَٱلْبَغْضَآءَ إِلَىٰ يَوْمِ ٱلْقِيَـٰمَةِ ۚ وَسَوْفَ يُنَبِّئُهُمُ ٱللَّهُ بِمَا كَانُوا۟ يَصْنَعُونَ ۝١٤

5:14 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.