(And with those who say: " Lo! we are Christians " ), i.e. the Christians of Najran (We made a covenant) in the Gospel that they should follow Muhammad (pbuh) and manifest his traits and not worship anyone or anything except Allah or associate anyone with Him, (but they forgot a part) they left part (of that whereof they were admonished) with which they were commanded. (Therefore We have stirred up) We have cast (enmity) killing and destruction (and hatred) in the hearts (among them) between the Jews and Christians; and it is said between the Nestorians of Najran, the sects known as the Jacobites, the Marqusiyya and the Melkites (till the Day of Resurrection, when Allah will inform them of their handiwork) of their opposition, treachery, concealment, enmity and hatred.