Proverbs 10:20
Choice silver is a tongue of righteousness, a heart of wickedness is {of little worth}.
Proverbs 12:18
There is one who speaks rashly, like the thrust of a sword, but the tongue of the wise brings healing.
Genesis 6:5
And Yahweh saw that the evil of humankind [was] great upon the earth, and every inclination of the thoughts of his heart [was] always only evil.
Genesis 8:21
And Yahweh smelled the soothing fragrance, and Yahweh said {to himself}, "{Never again will I curse} the ground for the sake of humankind, because the inclination of the heart of humankind [is] evil from his youth. {Nor will I ever again destroy} all life as I have done.
Proverbs 8:19
My fruit is better than gold, even refined gold, and my yield than choice silver.
Proverbs 15:4
Gentleness of tongue is a tree of life, but perverseness in it [causes] a break in spirit.
Proverbs 16:13
The delight of kings [are] the lips of righteousness, and he who speaks what is upright he will love.
Proverbs 23:7
For, like hair in his {throat}, so it is. "Eat and drink!" he will say to you, but his heart will not be with you.
Proverbs 25:11-12
Apples of gold in a setting of silver is a matter spoken at its proper time.
Jeremiah 17:9
The heart [is] deceitful more than anything else, and it [is] disastrous. Who can understand it?
Matthew 12:34-35
Offspring of vipers! How are you able to say good things [when you] are evil? For from the abundance of the heart the mouth speaks.