Proverbs 10:20

The tongue of the upright man is like tested silver: the heart of the evil-doer is of little value.

Proverbs 12:18

There are some whose uncontrolled talk is like the wounds of a sword, but the tongue of the wise makes one well again.

Genesis 6:5

And the Lord saw that the sin of man was great on the earth, and that all the thoughts of his heart were evil.

Genesis 8:21

And when the sweet smell came up to the Lord, he said in his heart, I will not again put a curse on the earth because of man, for the thoughts of man's heart are evil from his earliest days; never again will I send destruction on all living things as I have done.

Proverbs 8:19

My fruit is better than gold, even than the best gold; and my increase is more to be desired than silver.

Proverbs 15:4

A comforting tongue is a tree of life, but a twisted tongue is a crushing of the spirit.

Proverbs 16:13

Lips of righteousness are the delight of kings; and he who says what is upright is dear to him.

Proverbs 23:7

For as the thoughts of his heart are, so is he: Take food and drink, he says to you; but his heart is not with you.

Proverbs 25:11-12

A word at the right time is like apples of gold in a network of silver.

Jeremiah 17:9

The heart is a twisted thing, not to be searched out by man: who is able to have knowledge of it?

Matthew 12:34-35

You offspring of snakes, how are you, being evil, able to say good things? because out of the heart's store come the words of the mouth.

Treasury of Scripture Knowledge

Summary

The tongue of the just is as choice silver: the heart of the wicked is little worth.

General references

Bible References

Tongue

Proverbs 12:18
There are some whose uncontrolled talk is like the wounds of a sword, but the tongue of the wise makes one well again.
Proverbs 15:4
A comforting tongue is a tree of life, but a twisted tongue is a crushing of the spirit.
Proverbs 16:13
Lips of righteousness are the delight of kings; and he who says what is upright is dear to him.
Proverbs 25:11
A word at the right time is like apples of gold in a network of silver.
Matthew 12:35
The good man out of his good store gives good things; and the evil man out of his evil store gives evil things.

General references

Proverbs 8:10
Take my teaching, and not silver; get knowledge in place of the best gold.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain