And from those who say, "We are Christians" We took their covenant; but they forgot a portion of that of which they were reminded.1 So We caused among them2 animosity and hatred until the Day of Resurrection. And Allāh is going to inform them about what they used to do.
Translation: Saheeh International (English)
1 In the Gospel concerning the coming of Prophet Muḥammad (ﷺ).
2 i.e., among their various denominations or sects.
Just as I took a firm promise from the Jews, I also took a promise from those who declare themselves to be pure followers of Jesus (peace be upon him). They also left out practicing some of what they were advised to do, just as their predecessors from among the jews did. I then placed enmity and hatred between them and they began fighting and killing one another, each one declaring the other to be a disbeliever. Allah will inform them about what they used to do and will repay them for the same.