'Party' in the Bible

And there occurred a great uproar; and some of the scribes of the Pharisaic party stood up and began to argue heatedly, saying, “We find nothing wrong with this man; suppose a spirit or an angel has spoken to him?”

For prior to the coming of certain men from James, he used to eat with the Gentiles; but when they came, he began to withdraw and hold himself aloof, fearing the party of the circumcision.

Now a mediator is not for one party only; whereas God is only one.