[Psa 5:9 KJV] 9 For [there is] no faithfulness in their mouth; their inward part [is] very wickedness; their throat [is] an open sepulchre; they flatter with their tongue.

[Psa 52:2 KJV] 2 Thy tongue deviseth mischiefs; like a sharp razor, working deceitfully.

[Psa 73:7-9 KJV] 7 Their eyes stand out with fatness: they have more than heart could wish. 8 They are corrupt, and speak wickedly [concerning] oppression: they speak loftily. 9 They set their mouth against the heavens, and their tongue walketh through the earth.

[1Co 15:33 KJV] 33 Be not deceived: evil communications corrupt good manners.

[Eph 5:3-4 KJV] 3 But fornication, and all uncleanness, or covetousness, let it not be once named among you, as becometh saints; 4 Neither filthiness, nor foolish talking, nor jesting, which are not convenient: but rather giving of thanks.

[Col 3:8 KJV] 8 But now ye also put off all these; anger, wrath, malice, blasphemy, filthy communication out of your mouth.

[Col 4:6 KJV] 6 Let your speech [be] alway with grace, seasoned with salt, that ye may know how ye ought to answer every man.

[1Th 5:11 KJV] 11 Wherefore comfort yourselves together, and edify one another, even as also ye do.

[Col 3:16 KJV] 16 Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord.

[Deu 6:6-7 KJV] 6 And these words, which I command thee this day, shall be in thine heart: 7 And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up.

[Mal 3:16-17 KJV] 16 Then they that feared the LORD spake often one to another: and the LORD hearkened, and heard [it], and a book of remembrance was written before him for them that feared the LORD, and that thought upon his name. 17 And they shall be mine, saith the LORD of hosts, in that day when I make up my jewels; and I will spare them, as a man spareth his own son that serveth him.

[Pro 15:7 KJV] 7 The lips of the wise disperse knowledge: but the heart of the foolish [doeth] not so.

[Mat 12:36-37 KJV] 36 But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment. 37 For by thy words thou shalt be justified, and by thy words thou shalt be condemned.

[Tit 3:2 KJV] 2 To speak evil of no man, to be no brawlers, [but] gentle, shewing all meekness unto all men.

[Jas 3:2-8 KJV] 2 For in many things we offend all. If any man offend not in word, the same [is] a perfect man, [and] able also to bridle the whole body. 3 Behold, we put bits in the horses' mouths, that they may obey us; and we turn about their whole body. 4 Behold also the ships, which though [they be] so great, and [are] driven of fierce winds, yet are they turned about with a very small helm, whithersoever the governor listeth. 5 Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth! 6 And the tongue [is] a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell. 7 For every kind of beasts, and of birds, and of serpents, and of things in the sea, is tamed, and hath been tamed of mankind: 8 But the tongue can no man tame; [it is] an unruly evil, full of deadly poison.

[Jas 4:11 KJV] 11 Speak not evil one of another, brethren. He that speaketh evil of [his] brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge.

[1Pe 2:1 KJV] 1 Wherefore laying aside all malice, and all guile, and hypocrisies, and envies, and all evil speakings,