Matthew 16:12

Then they perceived that He had not warned them against bread-yeast, but against the teaching of the Pharisees and Sadducees.

Matthew 5:20

For I assure you that unless your righteousness greatly surpasses that of the Scribes and the Pharisees, you will certainly not find entrance into the Kingdom of the Heavens.

Matthew 15:4-9

For God said, 'Honour thy father and thy mother'; and 'Let him who reviles father or mother be certainly put to death';

Matthew 23:13-28

"But alas for you, Scribes and Pharisees, hypocrites, for you lock the door of the Kingdom of the Heavens against men; you yourselves do not enter, nor do you allow those to enter who are seeking to do so.

Acts 23:8

For the Sadducees maintain that there is no resurrection, and neither angel nor spirit; but the Pharisees acknowledge the existence of both.

Treasury of Scripture Knowledge

Summary

Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.

Bible References

But

Matthew 15:4
For God said, 'Honour thy father and thy mother'; and 'Let him who reviles father or mother be certainly put to death';
Matthew 23:13
"But alas for you, Scribes and Pharisees, hypocrites, for you lock the door of the Kingdom of the Heavens against men; you yourselves do not enter, nor do you allow those to enter who are seeking to do so.
Acts 23:8
For the Sadducees maintain that there is no resurrection, and neither angel nor spirit; but the Pharisees acknowledge the existence of both.