1 Peter 2:22

who committed no sin, neither was deceit found in his mouth,

James 1:26

But if any one among you thinks he is religious, and bridles not his tongue, but deceives his mind, that man's religion is vain.

James 3:2

For in many things we all offend; if one offends not in word he is a perfect man, able to keep in subjection also the whole body.

1 Peter 2:1

Laying aside therefore all malice and all deceit and hypocrisies and envies and all evil speakings,

Matthew 12:35-37

The good man, out of his good treasury, casts forth good things; and the evil man, out of his evil treasury, casts forth evil things.

Colossians 3:9

lie not one to another; put off the old man with his doings,

James 1:19

Understand, my beloved brothers, and let every man be swift to hear, slow to speak, slow to anger;

James 3:5-10

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

Revelation 14:4-5

These are they who were not defiled with women; for they are virgins; these are those who follow the Lamb wherever he goes. These were redeemed from men a first fruit to 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 his good treasury, casts forth good things; and the evil man, out of his evil treasury, casts forth evil things.
James 1:19
Understand, my beloved brothers, and let every man be swift to hear, slow to speak, slow to anger;
James 3:2
For in many things we all offend; if one offends not in word he is a perfect man, able to keep in subjection also the whole body.

Speaking

Colossians 3:9
lie not one to another; put off the old man with his doings,
1 Peter 2:1
Laying aside therefore all malice and all deceit and hypocrisies and envies and all evil speakings,
Revelation 14:4
These are they who were not defiled with women; for they are virgins; these are those who follow the Lamb wherever he goes. These were redeemed from men a first fruit to God and the Lamb,