tongue
Proverbs 12:18 There is that speaks like the piercings of a sword: but the tongue of the wise is health.
Proverbs 15:4 A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
Proverbs 16:13 Righteous lips are the delight of kings; and they love him that speaks right.
Proverbs 25:11,12 A word fitly spoken is like apples of gold in pictures of silver...
Matthew 12:35 A good man out of the good treasure of the heart brings forth good things...
the heart
Proverbs 23:7 For as he thinks in his heart, so is he: Eat and drink, said he to you; but his heart is not with you.
Genesis 6:5 And God saw that the wickedness of man was great in the earth...
Genesis 8:21 And the LORD smelled a sweet smell; and the LORD said in his heart, I will not again curse the ground any more for man's sake...
Jeremiah 17:9 The heart is deceitful above all things, and desperately wicked: who can know it?
Matthew 12:34 O generation of vipers, how can you, being evil, speak good things? for out of the abundance of the heart the mouth speaks.