The Cow - 2:85
After all this, you still kill one another and drive out a group of you from their homes and unite against them in evil and enmity. It is already forbidden for you to drive them out of their homes, and as if that were not enough, when they are captured by you, you demand ransom from them. Or do you believe in part of the Book and disbelieve in part of it? What is the recompense for those who do so but disgrace in the life of this world and the harshest of torments on the Day of Resurrection? Allah is not heedless of what you do.
Do you believe in part of the Book and disbelieve in part of it?
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."
The Women/4:151
These are the true disbelievers. For the disbelievers We are preparing a painful torment.