1 Peter 2:22

leaving an example for your exact imitation, he who never offended, and from whose lips no fallacy was ever utter'd,

James 1:26

If a person of an ungovernable tongue pretends to religion, he abuses himself: for his religion is meer illusion.

James 3:2

for we are all liable to frequent mistakes. he that does not give too great a loose to his tongue, is an accomplish'd person and fit to moderate the whole church.

1 Peter 2:1

Renouncing therefore every kind of malice, and knavery, hypocrisy, envy, and detraction, as new-born infants desire that mystical milk,

Matthew 12:35-37

a good man out of the good treasure produces good things: and an evil man, out of the evil treasure, produces evil things.

Colossians 3:9

let there be no fraud among you, since you have discarded your former habits and practices, and are become new men,

James 1:19

Wherefore, my dear brethren, let every one be eager to hear, averse to contradiction, and deaf to passion.

James 3:5-10

so the tongue is but a small part of the body, yet how grand are its pretensions. a spark of fire! what quantities of timber will it blow into a flame?

Revelation 14:4-5

these are they who were not defiled with women: for they are virgins: these are they who follow the lamb wherever he goes: these were ransom'd from among men, being the first fruits unto God, and to the lamb.

Treasury of Scripture Knowledge

Summary

Keep thy tongue from evil, and thy lips from speaking guile.

Bible References

Keep

Matthew 12:35
a good man out of the good treasure produces good things: and an evil man, out of the evil treasure, produces evil things.
James 1:19
Wherefore, my dear brethren, let every one be eager to hear, averse to contradiction, and deaf to passion.
James 3:2
for we are all liable to frequent mistakes. he that does not give too great a loose to his tongue, is an accomplish'd person and fit to moderate the whole church.

Speaking

Colossians 3:9
let there be no fraud among you, since you have discarded your former habits and practices, and are become new men,
1 Peter 2:1
Renouncing therefore every kind of malice, and knavery, hypocrisy, envy, and detraction, as new-born infants desire that mystical milk,
Revelation 14:4
these are they who were not defiled with women: for they are virgins: these are they who follow the lamb wherever he goes: these were ransom'd from among men, being the first fruits unto God, and to the lamb.