1 Peter 2:22

who did no sin, neither was guile found in his mouth,

James 1:26

But if any one seems to be religious, bridling not his own tongue, but deceiving his own heart, the religion of that man is vain.

James 3:2

For we all fail in many things; if any one fails not in word, the same is a perfect man, able even to bridle the whole body.

1 Peter 2:1

Therefore having laid aside all evil, and all guile, and hypocrisies, and envyings, and all calumniations;

Matthew 12:35-37

The good man, out of the good treasure (heart) brings forth good things: and the wicked man out of the wicked treasure (heart) brings forth wicked things.

Colossians 3:9

lie not to one another, having laid aside the old man with his habits,

James 1:19

Know, my beloved brethren; but let every man be swift to hear, slow to speak, slow toward wrath:

James 3:5-10

so also the tongue is a little member, and it boasts great things. Behold, how great a wood a little fire kindles!

Revelation 14:4-5

These are they who have not been defiled with women; for they are virgins. These are they who follow the Lamb whithersoever he may go. They have been redeemed from men, the first fruit unto God and 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 the good treasure (heart) brings forth good things: and the wicked man out of the wicked treasure (heart) brings forth wicked things.
James 1:19
Know, my beloved brethren; but let every man be swift to hear, slow to speak, slow toward wrath:
James 3:2
For we all fail in many things; if any one fails not in word, the same is a perfect man, able even to bridle the whole body.

Speaking

Colossians 3:9
lie not to one another, having laid aside the old man with his habits,
1 Peter 2:1
Therefore having laid aside all evil, and all guile, and hypocrisies, and envyings, and all calumniations;
Revelation 14:4
These are they who have not been defiled with women; for they are virgins. These are they who follow the Lamb whithersoever he may go. They have been redeemed from men, the first fruit unto God and the Lamb.