1 Peter 2:22

Who did no sin, neither was guile found in his mouth;

James 1:26

If anyone thinks that he is religious, while he bridles not his own tongue, but deceives his own heart, this man's religion is vain.

James 3:2

For in many things we all stumble. If anyone stumbles not in word, the same is a perfect man, able to restrain also the whole body.

1 Peter 2:1

Having, therefore, put away all wickedness, and all guile, and hypocrisy, and envies, and all evil speakings,

Matthew 12:35-37

The good man, out of his good treasure, puts forth good things; and the evil man, out of his evil treasure, puts forth evil things.

Colossians 3:9

Lie not one to another, having put off the old man with his practices,

James 1:19

Ye know this, my beloved brethren; but let every man be quick to hear, slow to speak, slow to wrath;

James 3:5-10

So also the tongue is a little member, and boasts great things. Behold, how small a fire kindles how great a forest!

Revelation 14:4-5

These are those who were not defiled with women; for they are virgins. These are those who follow the Lamb whithersoever He goeth. These were redeemed from among men, a first fruit 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, out of his good treasure, puts forth good things; and the evil man, out of his evil treasure, puts forth evil things.
James 1:19
Ye know this, my beloved brethren; but let every man be quick to hear, slow to speak, slow to wrath;
James 3:2
For in many things we all stumble. If anyone stumbles not in word, the same is a perfect man, able to restrain also the whole body.

Speaking

Colossians 3:9
Lie not one to another, having put off the old man with his practices,
1 Peter 2:1
Having, therefore, put away all wickedness, and all guile, and hypocrisy, and envies, and all evil speakings,
Revelation 14:4
These are those who were not defiled with women; for they are virgins. These are those who follow the Lamb whithersoever He goeth. These were redeemed from among men, a first fruit to God and to the Lamb.