The Women - 4:150
"Those who oppose Allah and His messenger, those who seek to separate between Allah and His messengers, those who say: "We believe in part and disbelieve in part,"and those who seek a way between the two."
A reference to the disbelievers of the people of the Book who seek to drive a wedge between Allah and His messengers:
The Cow/2:140
"Do you claim that Abraham, Ishmael, Isaac, Jacob and their descendants were Jews or Christians? Say: "Do you know better or Allah? Who is more unjust than he who conceals what Allah has revealed? Allah is not heedless of what you do."
The Family Of Imran/3:65
O people of the Book, why do you dispute about Abraham, when the Injeel and the Torah were sent down after him? Do you not use your intellect?
The Family Of Imran/3:66
You argue about matters about which you have knowledge! But how can you argue about something about which you have no knowledge? You may not know, but Allah knows.
The Family Of Imran/3:67
Abraham was neither a Jew nor a Christian; he was a monotheistic Muslim. He was never of those who associate partners.