Luke 6:45
The good man out of the good treasure of his heart brings forth good, and an evil man out of the evil treasure of his heart brings forth evil. For out of the abundance of the heart his mouth speaks.
Matthew 12:34-37
You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.
Acts 8:19-23
saying, "Give me also this power, so that everyone on whom I lay my hands may receive the Holy Spirit."
Romans 3:13-14
"Their throat is an open grave; they use their tongues to practice deceit." "The poison of asps is under their lips."
Ephesians 4:29
Let no unwholesome talk come out of your mouths, but only such as is good for building others up according to the need of the moment, that it may impart grace to those who hear.
Ephesians 5:3-4
But immorality or any impurity or greed must not even be named among you, as is proper among saints.
Ephesians 5:19
speaking to one another in psalms and hymns and spiritual songs, singing and making melody with your heart to the Lord,
Colossians 4:6
Let your speech always be full of grace, seasoned with salt, so that you may know how you ought to answer everyone.
Hebrews 8:10
This is the covenant that I will make with the house of Israel after those days, says the Lord: I will put my laws into their minds, and I will write them on their hearts, and I will be their God, and they shall be my people.
James 3:5-8
So also the tongue is a small part of the body, and yet it boasts of great things. See how great a forest is set aflame by such a small fire!
John 7:38
He who believes in me, as the Scripture has said, out of his heart will flow rivers of living water."
Acts 5:3
But Peter said, "Ananias, why has Satan filled your heart to lie to the Holy Spirit and to keep back some of the price of the land?
2 Corinthians 4:6-7
For it is the God who said, "Let light shine out of darkness," who has shone in our hearts to give the light of the knowledge of the glory of God in the face of Christ.
Ephesians 3:8
To me, though I am the very least of all the saints, this grace was given, to preach to the Gentiles the unsearchable riches of Christ,
Colossians 3:16
Let the word of Christ dwell in you richly, teach and admonish one another with all wisdom, and sing psalms and hymns and spiritual songs with thankfulness in your hearts to God.
Jude 1:15
to execute judgment on all, and to convict all the ungodly of all their ungodly deeds which they have done in an ungodly way, and of all the harsh things which ungodly sinners have spoken against him."