Proverbs 16:23
The heart of the wise shall attend to his mouth, and he shall add knowledge to his lips.
Proverbs 15:28
The heart of the just one shall meditate to answer: and the mouth of the unjust shall gush out evil.
Psalm 37:30-31
The mouth of the just one shall speak wisdom, and his tongue shall speak judgment
Psalm 45:1
To the overseer over the lilies, for the sons of Korah, instruction: a song of the beloved. My heart boiled over a good word: I say my works to the king: my tongue the pen of one writing promptly.
Proverbs 22:17-18
Incline thine ear and hear the words of the wise, and thou shalt set thy heart to my knowledge.
Matthew 12:34-35
O generation of vipers! how can ye speak good things, being evil? for out of the abundance of the heart the month speaks.
Colossians 3:16
Let the word of Christ dwell in, you richly; teaching and reminding one another in all wisdom, playing with harps, and songs, and spiritual odes, with grace singing in your hearts to the Lord.