Proverbs 15:28 - The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things. (Verses like Proverbs 15:28)
Psalms 37:30-31 - The mouth of the righteous speaketh wisdom, and his tongue talketh of judgment.The law of his God is in his heart; none of his steps shall slide. (Verses like Psalms 37:30)
Psalms 45:1 - (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. (Verses like Psalms 45:1)
Proverbs 22:17-18 - Bow down thine ear, and hear the words of the wise, and apply thine heart unto my knowledge.For it is a pleasant thing if thou keep them within thee; they shall withal be fitted in thy lips. (Verses like Proverbs 22:17)
Matthew 12:34-35 - O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.A 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. (Verses like Matthew 12:34)
Colossians 3:16 - Let 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. (Verses like Colossians 3:16)