There are so many good proverbs about careful, honest speech:
“He who guards his mouth preserves his life; he who opens wide his lips comes to ruin.”
Proverbs 13:3
“The words of the wicked lie in wait for blood, but the mouth of the upright delivers men.”
Proverbs 12:6
“The talk of a fool is a rod for his back, but the lips of the wise will preserve them.”
Proverbs 14:3
“An evil man is ensnared by the transgression of his lips, but the righteous escapes from trouble.”
Proverbs 12:13
“There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing.”
Proverbs 12:18
“Truthful lips endure for ever, but a lying tongue is but for a moment.”
Proverbs 12:19
“Lying lips are an abomination to the Lord, but those who act faithfully are his delight.”
Proverbs 12:22
“The wise of heart will heed commandments, but a prating fool will come to ruin.”
Proverbs 10:8
“The mouth of the righteous is a fountain of life, but the mouth of the wicked conceals violence.”
Proverbs 10:11
“He who conceals hatred has lying lips, and he who utters slander is a fool. When words are many, transgression is not lacking, but he who restrains his lips is prudent. The tongue of the righteous is choice silver; the mind of the wicked is of little worth. The lips of the righteous feed many, but fools die for lack of sense.”
Proverbs 10:18-21
“The mouth of the righteous brings forth wisdom, but the perverse tongue will be cut off. The lips of the righteous know what is acceptable, but the mouth of the wicked, what is perverse.”
Proverbs 10:31-32
“Hear, for I will speak noble things, and from my lips will come what is right; for my mouth will utter truth; wickedness is an abomination to my lips. All the words of my mouth are righteous; there is nothing twisted or crooked in them.”
Proverbs 8:6-8
“A truthful witness saves lives, but one who utters lies is a betrayer.”
Proverbs 14:25
“A gentle tongue is a tree of life, but perverseness in it breaks the spirit.”
Proverbs 15:4
“The mind of the wise makes his speech judicious, and adds persuasiveness to his lips. Pleasant words are like a honeycomb, sweetness to the soul and health to the body.”
Proverbs 16:23-24
“A worthless man plots evil, and his speech is like a scorching fire. A perverse man spreads strife, and a whisperer separates close friends.”
“Hear, for I will speak noble things, and from my lips will come what is right; for my mouth will utter truth; wickedness is an abomination to my lips. All the words of my mouth are righteous; there is nothing twisted or crooked in them. They are all straight to him who understands and right to those who find knowledge. Take my instruction instead of silver, and knowledge rather than choice gold; for wisdom is better than jewels, and all that you may desire cannot compare with her.”
“From the fruit of his mouth a man is satisfied; he is satisfied by the yield of his lips. Death and life are in the power of the tongue, and those who love it will eat its fruits.”
“The words of a man's mouth are deep waters; the fountain of wisdom is a gushing stream. A fool's lips bring strife, and his mouth invites a flogging. A fool's mouth is his ruin, and his lips are a snare to himself.”
There are so many good proverbs about careful, honest speech:
“He who guards his mouth preserves his life; he who opens wide his lips comes to ruin.”
Proverbs 13:3
“The words of the wicked lie in wait for blood, but the mouth of the upright delivers men.”
Proverbs 12:6
“The talk of a fool is a rod for his back, but the lips of the wise will preserve them.”
Proverbs 14:3
“An evil man is ensnared by the transgression of his lips, but the righteous escapes from trouble.”
Proverbs 12:13
“There is one whose rash words are like sword thrusts, but the tongue of the wise brings healing.”
Proverbs 12:18
“Truthful lips endure for ever, but a lying tongue is but for a moment.”
Proverbs 12:19
“Lying lips are an abomination to the Lord, but those who act faithfully are his delight.”
Proverbs 12:22
“The wise of heart will heed commandments, but a prating fool will come to ruin.”
Proverbs 10:8
“The mouth of the righteous is a fountain of life, but the mouth of the wicked conceals violence.”
Proverbs 10:11
“He who conceals hatred has lying lips, and he who utters slander is a fool. When words are many, transgression is not lacking, but he who restrains his lips is prudent. The tongue of the righteous is choice silver; the mind of the wicked is of little worth. The lips of the righteous feed many, but fools die for lack of sense.”
Proverbs 10:18-21
“The mouth of the righteous brings forth wisdom, but the perverse tongue will be cut off. The lips of the righteous know what is acceptable, but the mouth of the wicked, what is perverse.”
Proverbs 10:31-32
“Hear, for I will speak noble things, and from my lips will come what is right; for my mouth will utter truth; wickedness is an abomination to my lips. All the words of my mouth are righteous; there is nothing twisted or crooked in them.”
Proverbs 8:6-8
“A truthful witness saves lives, but one who utters lies is a betrayer.”
Proverbs 14:25
“A gentle tongue is a tree of life, but perverseness in it breaks the spirit.”
Proverbs 15:4
“The mind of the wise makes his speech judicious, and adds persuasiveness to his lips. Pleasant words are like a honeycomb, sweetness to the soul and health to the body.”
Proverbs 16:23-24
“A worthless man plots evil, and his speech is like a scorching fire. A perverse man spreads strife, and a whisperer separates close friends.”
Proverbs 16:27-28
“Hear, for I will speak noble things, and from my lips will come what is right; for my mouth will utter truth; wickedness is an abomination to my lips. All the words of my mouth are righteous; there is nothing twisted or crooked in them. They are all straight to him who understands and right to those who find knowledge. Take my instruction instead of silver, and knowledge rather than choice gold; for wisdom is better than jewels, and all that you may desire cannot compare with her.”
Proverbs 8:6-11
“Fine speech is not becoming to a fool; still less is false speech to a prince.”
Proverbs 17:7
“A worthless person, a wicked man, goes about with crooked speech,”
Proverbs 6:12
“For the lips of a loose woman drip honey, and her speech is smoother than oil; but in the end she is bitter as wormwood, sharp as a two-edged sword.”
Proverbs 5:3-4
“A lying tongue hates its victims, and a flattering mouth works ruin.”
Proverbs 26:28
“Be not a witness against your neighbor without cause, and do not deceive with your lips.”
Proverbs 24:28
“My soul will rejoice when your lips speak what is right.”
Proverbs 23:16
“The mouth of a loose woman is a deep pit; he with whom the Lord is angry will fall into it.”
Proverbs 22:14
“A false witness will perish, but the word of a man who hears will endure.”
Proverbs 21:28
“The getting of treasures by a lying tongue is a fleeting vapor and a snare of death.”
Proverbs 21:6
“A worthless witness mocks at justice, and the mouth of the wicked devours iniquity.”
Proverbs 19:28
“A false witness will not go unpunished, and he who utters lies will not escape.”
Proverbs 19:5
“Better is a poor man who walks in his integrity than a man who is perverse in speech, and is a fool.”
Proverbs 19:1
“From the fruit of his mouth a man is satisfied; he is satisfied by the yield of his lips. Death and life are in the power of the tongue, and those who love it will eat its fruits.”
Proverbs 18:20-21
“The words of a man's mouth are deep waters; the fountain of wisdom is a gushing stream. A fool's lips bring strife, and his mouth invites a flogging. A fool's mouth is his ruin, and his lips are a snare to himself.”
Proverbs 18:4, 6-7
“Even a fool who keeps silent is considered wise; when he closes his lips, he is deemed intelligent.”
Proverbs 17:28