Luke 6:45
A good man, out of the good treasure of his heart, bringeth forth that which is good; and an evil man, out of the evil treasure of his heart, bringeth forth that which is evil: for out of the abundance of the heart his mouth speaketh.
Matthew 12:34-37
O race of vipers, how can ye speak good things, who are yourselves so wicked? for out of the abundance of the heart the mouth speaketh.
Acts 8:19-23
saying, Give me also this power, that on whomsoever I lay hands, he may receive the holy Spirit.
Romans 3:13-14
Their throat is an open sepulchre: with their tongues they have used deceit; the poison of asps is under their lips:
Ephesians 4:29
Let no corrupt word come out of your mouth; but what is good to useful edification, that it may benefit the hearers.
Ephesians 5:3-4
But fornication, and all uncleanness, or inordinate desire, let it not be even named among you; for so it becometh saints:
Ephesians 5:19
speaking to yourselves in psalms, and hymns, and spiritual songs, singing and making melody in your heart to the Lord:
Colossians 4:6
Let your speech be always with grace, seasoned with discretion to know how ye ought to answer every one.
Hebrews 8:10
But this is the covenant that I will make with the house of Israel after those days, saith the Lord, I will put my laws into their mind, and I will inscribe them on their hearts; and I will be to them a God, and they shall be to me a people.
James 3:5-8
So the tongue is a small part of the body, yet boasteth great things. Behold how much fuel a little fire kindleth!
John 7:38
He that believeth on me, as the scripture hath said, rivers of living water shall flow from within him.
Acts 5:3
But Peter said, Ananias, why hath Satan so filled thine heart, that thou shouldst lie to the holy Ghost, and keep back part of the price of the land?
2 Corinthians 4:6-7
For God, who commanded light to shine out of darkness, hath shined into our hearts, to reflect the light of the knowledge of the glory of God in the face of Jesus Christ.
Ephesians 3:8
On me, who am less than the least of all saints, was this grace bestowed, that I should preach among the Gentiles the unsearchable riches of Christ,
Colossians 3:16
Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another by psalms, and hymns, and spiritual songs, with gratitude singing in your hearts to the Lord.
Jude 1:15
to pass judgement upon all, and to convict all the ungodly among them of all their wicked works, which they have impiously committed, and of all the hard things which impious sinners have spoken against Him.