1 Peter 2:22

who committed no sin, neither was guile found in his mouth;

James 1:26

If any one thinks that he is religious, and bridles not his tongue, but deceives his own heart, this mans religion is vain.

James 3:2

For in many things we all offend. If any one offend not in speech, the same is a perfect man, able to bridle the whole body also.

1 Peter 2:1

Laying aside therefore all malice, and all guile, and hypocrisies, and envies, and all slander,

Matthew 12:35-37

The good man, from his good treasure, bringeth out good things; and the evil man, from his evil treasure, bringeth out evil things.

Colossians 3:9

Lie not one to another, seeing that ye have put off the old man with his deeds,

James 1:19

Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath.

James 3:5-10

So also the tongue is a little member, and boasteth great things. Behold, how great a forest a little fire kindleth!

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 goeth. These were redeemed from among men, a firstfruits to 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
The good man, from his good treasure, bringeth out good things; and the evil man, from his evil treasure, bringeth out evil things.
James 1:19
Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath.
James 3:2
For in many things we all offend. If any one offend not in speech, the same is a perfect man, able to bridle the whole body also.

Speaking

Colossians 3:9
Lie not one to another, seeing that ye have put off the old man with his deeds,
1 Peter 2:1
Laying aside therefore all malice, and all guile, and hypocrisies, and envies, and all slander,
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 goeth. These were redeemed from among men, a firstfruits to God and to the Lamb.