Al-Maaida 5:14

And from among those who say, “We are Christians,” We took a covenant from them, but they forgot a part of what was enjoined upon them[15]. So We induced hostility and hatred among them[16] until the Day of Resurrection, and Allah will inform them of what they used to do.

[15] Concerning the coming of Prophet Muhammad (ﷺ) in the Injeel (Gospel).
[16] Among their various denominations or sects.

And from those who say, "We are Christians" We took their covenant; but they forgot a portion of that of which they were reminded.[249] So We caused among them[250] animosity and hatred until the Day of Resurrection. And Allāh is going to inform them about what they used to do.

[249] In the Gospel concerning the coming of Prophet Muḥammad (ﷺ).
[250] i.e., among their various denominations or sects.

14. And from those who call themselves Christians, We took their covenant, but they have abandoned a good part of the Message that was sent to them.[6] So We planted amongst them enmity and hatred till the Day of Resurrection (when they discarded Allâh’s Book, disobeyed Allâh’s Messengers and His Orders and transgressed beyond bounds in Allâh’s disobedience); and Allâh will inform them of what they used to do.

[6] (V.5:14) a) The Christians were ordered in the Injeel (Gospel) to follow Prophet Muhammad صلى الله عليه وسلم when he would come as a Messenger of Allâh to all mankind.
[See (V.7:157) and its footnote].
b) See the footnote of (V.41:46)

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.