Proverbs 15:28; 12:18
The heart of the righteous ponders how to answer,
but the mouth of the wicked pours out evil things.
There is one whose rash words are like sword thrusts,
but the tongue of the wise brings healing. (ESV)
James 3:1-12
Not many of you should become teachers, my brothers, for you know that we who teach will be judged with greater strictness. For we all stumble in many ways. And if anyone does not stumble in what he says, he is a perfect man, able also to bridle his whole body. If we put bits into the mouths of horses so that they obey us, we guide their whole bodies as well. Look at the ships also: though they are so large and are driven by strong winds, they are guided by a very small rudder wherever the will of the pilot directs. So also the tongue is a small member, yet it boasts of great things.
How great a forest is set ablaze by such a small fire! And the tongue is a fire, a world of unrighteousness. The tongue is set among our members, staining the whole body, setting on fire the entire course of life, and set on fire by hell. For every kind of beast and bird, of reptile and sea creature, can be tamed and has been tamed by mankind, but no human being can tame the tongue. It is a restless evil, full of deadly poison. With it we bless our Lord and Father, and with it we curse people who are made in the likeness of God. From the same mouth come blessing and cursing. My brothers, these things ought not to be so. Does a spring pour forth from the same opening both fresh and salt water? Can a fig tree, my brothers, bear olives, or a grapevine produce figs? Neither can a salt pond yield fresh water. (ESV)
Luke 11:37-54
While Jesus was speaking, a Pharisee asked him to dine with him, so he went in and reclined at table. The Pharisee was astonished to see that he did not first wash before dinner. And the Lord said to him, “Now you Pharisees cleanse the outside of the cup and of the dish, but inside you are full of greed and wickedness. You fools! Did not he who made the outside make the inside also? But give as alms those things that are within, and behold, everything is clean for you.
“But woe to you Pharisees! For you tithe mint and rue and every herb, and neglect justice and the love of God. These you ought to have done, without neglecting the others. Woe to you Pharisees! For you love the best seat in the synagogues and greetings in the marketplaces. Woe to you! For you are like unmarked graves, and people walk over them without knowing it.”
One of the lawyers answered him, “Teacher, in saying these things you insult us also.” And he said, “Woe to you lawyers also! For you load people with burdens hard to bear, and you yourselves do not touch the burdens with one of your fingers. Woe to you! For you build the tombs of the prophets whom your fathers killed. So you are witnesses and you consent to the deeds of your fathers, for they killed them, and you build their tombs. Therefore also the Wisdom of God said, ‘I will send them prophets and apostles, some of whom they will kill and persecute,’ so that the blood of all the prophets, shed from the foundation of the world, may be charged against this generation, from the blood of Abel to the blood of Zechariah, who perished between the altar and the sanctuary. Yes, I tell you, it will be required of this generation. Woe to you lawyers! For you have taken away the key of knowledge. You did not enter yourselves, and you hindered those who were entering.”
As he went away from there, the scribes and the Pharisees began to press him hard and to provoke him to speak about many things, lying in wait for him, to catch him in something he might say. (ESV)