Quran 3:20 — The Amramites (Ali-'Imran)

If they argue with you, then say, "I have simply submitted myself to GOD; I and those who follow me." You shall proclaim to those who received the scripture, as well as those who did not, "Would you submit?" If they submit, then they have been guided, but if they turn away, your sole mission is to deliver this message. GOD is Seer of all people.

[3:19] The only religion approved by GOD is "Submission." Ironically, those who have received the scripture are the ones who dispute this fact, despite the knowledge they have received, due to jealousy. For such rejectors of GOD's revelations, GOD is most strict in reckoning.

[3:21] Those who have rejected GOD's revelations, and killed the prophets unjustly, and killed those who advocated justice among the people, promise them a painful retribution.