But when he noticed a number of the Pharisees and Sadducees coming for his baptism, he said to them, "You brood of vipers, who told you to flee from the coming Wrath?

Jesus said to them, "See and beware of the leaven of the Pharisees and Sadducees."

While they were speaking to the people, they were surprised by the priests, the commander of the temple, and the Sadducees,

This filled the high priest Annas and his allies, the Sadducean party, with bitter jealousy;

Then, finding half the Sanhedrin were Sadducees and the other half Pharisees, Paul shouted to them, "I am a Pharisee, brothers, the son of Pharisees! It is for the hope of the resurrection from the dead that I am on trial!"

Which

Now if we preach that Christ rose from the dead, how can certain individuals among you assert that 'there is no such thing as a resurrection of the dead'?

they have failed in the Truth by arguing that the resurrection has taken place already, and they are undermining some people's faith.

General references

For while the Sadducees declare there is no such thing as resurrection, angels, or spirits, the Pharisees affirm them all.