also... some interesting passages.. not as strong as the first one,
"But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment. For by thy words thou shalt be justified, and by thy words shalt thou be condemned."
Matthew 12:36,37
"“The teachers of the law and the Pharisees sit in Moses’ seat. So you must obey them and do everything they tell you. But do not do what they do, for they do not practice what they preach...Woe to you, teachers of the law and Pharisees, you hypocrites! You shut the kingdom of heaven in men’s faces. You yourselves do not enter, nor will you let those enter who are trying to."
Matthew 23:2-3,13