“Death and life are in the power of the tongue, and those who love it will eat its fruit.” Proverbs 18:21

“Whoever guards his mouth and tongue keeps his soul from troubles.” Proverbs 21:23

“These six things the Lord hates,
Yes, seven are an abomination to Him:
A proud look,
A lying tongue,
Hands that shed innocent blood,
A heart that devises wicked plans,
Feet that are swift in running to evil,
A false witness who speaks lies,
And one who sows discord among brethren.”  Proverbs 6:16-19

“There is one who speaks like the piercings of a sword, but the tongue of the wise promotes health.” Proverbs 12:18

“The truthful lip shall be established forever, but a lying tongue is but for a moment.” Proverbs 12:19

“If anyone among you thinks he is religious, and does not bridle his tongue but deceives his own heart, this one’s religion is useless.” James 1:26

“My brethren, let not many of you become teachers, knowing that we shall receive a stricter judgment.

For we all stumble in many things. If anyone does not stumble in word, he is a perfect man, able also to bridle the whole body. Indeed, we put bits in horses’ mouths that they may obey us, and we turn their whole body. Look also at ships: although they are so large and are driven by fierce winds, they are turned by a very small rudder wherever the pilot desires. Even so the tongue is a little member and boasts great things.

See how great a forest a little fire kindles!

And the tongue is a fire, a world of iniquity. The tongue is so set among our members that it defiles the whole body, and sets on fire the course of nature; and it is set on fire by hell.

For every kind of beast and bird, of reptile and creature of the sea, is tamed and has been tamed by mankind. But no man can tame the tongue. It is an unruly evil, full of deadly poison.

With it we bless our God and Father, and with it we curse men, who have been made in the similitude of God. Out of the same mouth proceed blessing and cursing. My brethren, these things ought not to be so. Does a spring send forth fresh water and bitter from the same opening? Can a fig tree, my brethren, bear olives, or a grapevine bear figs? Thus no spring yields both salt water and fresh.” James 3:1-12

“For ‘He who would love life and see good days, let him refrain his tongue from evil, and his lips from speaking deceit.’” 1 Peter 3:10

“In the multitude of words sin is not lacking, but he who restrains his lips is wise.” Proverbs 10:19

“Pleasant words are like a honeycomb, sweetness to the soul and health to the bones.” Proverbs 16:24

“He who has knowledge spares his words, and a man of understanding is of a calm spirit.” Proverbs 17:27

“Do you see a man hasty in his words? There is more hope for a fool than for him.” Proverbs 29:20

“Either make the tree good and its fruit good, or else make the tree bad and its fruit bad; for a tree is known by its fruit. Brood of vipers! How can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks. A good man out of the good treasure of his heart brings forth good things, and an evil man out of the evil treasure brings forth evil things.

But I say to you that for every idle word men may speak, they will give account of it in the day of judgment.

For by your words you will be justified, and by your words you will be condemned.” Matthew 12:33-37

[Verses arranged by Isaac Muñoz]