Proverbs 15:28
The heart of the righteous studies to answer, but the mouth of the wicked pours out evil things.
1 Peter 3:15
but sanctify the Lord God in your hearts, and be ready always to give an answer to everyone who asks you a reason of the hope in you, with meekness and fear;
Proverbs 15:2
The tongue of the wise uses knowledge rightly, but the mouth of fools pours out foolishness.
1 Kings 3:23-28
And the king said, The one says, This is my son who lives, and your son is the dead. And the other says, No, but your son is the dead, and my son is the living.
Proverbs 10:19
In the multitude of words, sin is not lacking; but he who holds back his lips is wise.
Proverbs 13:16
Every wise one deals with knowledge, but a fool lays open his folly.
Proverbs 16:23
The heart of the wise teaches his mouth, and adds learning to his lips.
Proverbs 29:11
A fool speaks all his mind; but a wise one keeps it in until afterwards.
Proverbs 29:20
Do you see a man hasty in his words? There is more hope for a fool than for him.
Ecclesiastes 5:2
Do not be rash with your mouth, and do not let your heart be hasty to say a word before God. For God is in Heaven, and you are on earth; therefore let your words be few.
Ecclesiastes 5:6
Do not allow your mouth to cause your flesh to sin; do not say before the angel that it was an error. Why should God be angry at your voice and destroy the work of your hands?
Ecclesiastes 10:12-14
The words of a wise mouth are gracious; but the lips of a fool will swallow him.
Matthew 12:34
Offspring of vipers! How can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.
Titus 1:10-11
For there are indeed many unruly men, vain talkers and deceivers, especially those of the circumcision,
James 3:6-8
And the tongue is a fire, a world of iniquity. So the tongue is set among our members, spotting all the body and inflaming the course of nature, and being inflamed by hell.
2 Peter 2:18
For when they speak great swelling words of vanity, they lure through the lusts of the flesh, by unbridled lust, the ones who were escaping from those who live in error;