'Party' in the Bible

Now the high priest rose up and all those [who were] with him (that is, the party of the Sadducees), [and] they were filled with jealousy.

But some of those who had believed from the party of the Pharisees stood up, saying, "It is necessary to circumcise them and to command [them] to observe the law of Moses!"

And there was loud shouting, and some of the scribes from the party of the Pharisees stood up [and] contended sharply, saying, "We find nothing wrong with this man! But [what] if a spirit or an angel has spoken to him?"

having known me for a long time, if they are willing to testify, that in accordance with the strictest party of our religion I lived [as] a Pharisee.