Original Verse:
Proverbs Chapter 16 Verse 23The heart of the wise teacheth his mouth, and addeth learning to his lips.

Reference Verses:
Proverbs Chapter 16 Verse 21The wise in heart shall be called prudent: and the sweetness of the lips increaseth learning.
Ecclesiastes Chapter 10 Verse 12The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.
Proverbs Chapter 22 Verse 17Bow down thine ear, and hear the words of the wise, and apply thine heart unto my knowledge.
Psalms Chapter 37 Verse 31The law of his God is in his heart; none of his steps shall slide.
Colossians Chapter 3 Verse 16Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord.
Proverbs Chapter 22 Verse 18For it is a pleasant thing if thou keep them within thee; they shall withal be fitted in thy lips.
Psalms Chapter 45 Verse 1(To the chief Musician upon Shoshannim, for the sons of Korah, Maschil, A Song of loves.) My heart is inditing a good matter: I speak of the things which I have made touching the king: my tongue is the pen of a ready writer.
Matthew Chapter 12 Verse 35A good man out of the good treasure of the heart bringeth forth good things: and an evil man out of the evil treasure bringeth forth evil things.
Psalms Chapter 37 Verse 30The mouth of the righteous speaketh wisdom, and his tongue talketh of judgment.
Proverbs Chapter 15 Verse 28The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things.
Matthew Chapter 12 Verse 34O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.