Death and life are in the power of the tongue, and those who love it will eat its fruits.
See also James 3:1-12: “…the tongue is a fire …”
When words are many, transgression is not lacking, but whoever restrains his lips is prudent.
Do you see a man who is hasty in his words? There is more hope for a fool than for him.
If one gives an answer before he hears, it is his folly and shame.
A fool’s lips walk into a fight, and his mouth invites a beating.
A word fitly spoken is like apples of gold in a setting of silver.
There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing.
Anxiety in a man’s heart weighs him down, but a good word makes him glad.
To make an apt answer is a joy to a man, and a word in season, how good it is!
He who loves purity of heart, and whose speech is gracious, will have the king as his friend.
Put away from you crooked speech, and put devious talk far from you.
A lying tongue hates its victims, and a flattering mouth works ruin.
Truthful lips endure forever, but a lying tongue is but for a moment.
A soft answer turns away wrath, but a harsh word stirs up anger.
Whoever is slow to anger is better than the mighty, and he who rules his spirit than he who takes a city.
Good sense makes one slow to anger, and it is his glory to overlook an offense.
See also 1 Samuel 25: David, Nabal, and Abigail.
An evildoer listens to wicked lips, and a liar gives ear to a mischievous tongue.
The words of a whisperer are like delicious morsels; they go down into the inner parts of the body.
Do not speak in the hearing of a fool, for he will despise the good sense of your words.
Answer not a fool according to his folly, lest you be like him yourself.
Answer a fool according to his folly, lest he be wise in his own eyes.
Do not reprove a scoffer, or he will hate you; reprove a wise man, and he will love you.
See also Luke 8:31-2: And Jesus answered them, “Those who are well have no need of a physician, but those who are sick. I have not come to call the righteous, but sinners to repentance.”