Proverbs 10:20
The tongue of the righteous is as choice silver: The heart of the wicked is little worth.
Proverbs 12:18
There is that speaketh rashly like the piercings of a sword; But the tongue of the wise is health.
Genesis 6:5
And Jehovah saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.
Genesis 8:21
And Jehovah smelled the sweet savor; and Jehovah said in his heart, I will not again curse the ground any more for man's sake, for that the imagination of man's heart is evil from his youth; neither will I again smite any more everything living, as I have done.
Proverbs 8:19
My fruit is better than gold, yea, than fine gold; And my revenue than choice silver.
Proverbs 15:4
A gentle tongue is a tree of life; But perverseness therein is a breaking of the spirit.
Proverbs 16:13
Righteous lips are the delight of kings; And they love him that speaketh right.
Proverbs 23:7
For as he thinketh within himself, so is he: Eat and drink, saith he to thee; But his heart is not with thee.
Proverbs 25:11-12
A word fitly spoken Is like apples of gold in network of silver.
Jeremiah 17:9
The heart is deceitful above all things, and it is exceedingly corrupt: who can know it?
Matthew 12:34-35
Ye offspring of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.