Luke 6:45
The good man, out of the good treasure of his heart, brings forth good; and the wicked man out of the wicked, brings forth what is wicked: for out of the abundance of the heart his mouth speaks.
Psalm 37:30-31
The mouth of the righteous proffereth wisdom, and his tongue speaketh judgment;
Proverbs 4:23
Keep thy heart more than anything that is guarded; for out of it are the issues of life.
Matthew 12:34-37
Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.
Acts 8:19-23
saying, Give to me also this power, in order that on whomsoever I may 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; asps' poison is under their lips:
Ephesians 4:29
Let no corrupt word go out of your mouth, but if there be any good one for needful edification, that it may give grace to those that hear it.
Ephesians 5:3-4
But fornication and all uncleanness or unbridled lust, let it not be even named among you, as it becomes saints;
Ephesians 5:19
speaking to yourselves in psalms and hymns and spiritual songs, singing and chanting with your heart to the Lord;
Colossians 4:6
Let your word be always with grace, seasoned with salt, so as to know how ye ought to answer each one.
Hebrews 8:10
Because this is the covenant that I will covenant to the house of Israel after those days, saith the Lord: Giving my laws into their mind, I will write them also upon their hearts; and I will be to them for God, and they shall be to me for people.
James 3:5-8
Thus also the tongue is a little member, and boasts great things. See how little a fire, how large a wood it kindles!
Psalm 12:2-4
They speak falsehood every one with his neighbour: with flattering lip, with a double heart, do they speak.
Psalm 40:8-10
To do thy good pleasure, my God, is my delight, and thy law is within my heart.
Psalm 41:6-7
And if one come to see me, he speaketh falsehood; his heart gathereth wickedness to itself: he goeth abroad, he telleth it.
Psalm 52:2-4
Thy tongue deviseth mischievous things, like a sharp razor, practising deceit.
Psalm 59:7
Behold, they belch out with their mouth; swords are in their lips: for who say they doth hear?
Psalm 59:12
Because of the sin of their mouth, the word of their lips, let them even be taken in their pride; and because of cursing and lying which they speak.
Psalm 64:3-8
Who have sharpened their tongue like a sword, and have aimed their arrow, a bitter word;
Psalm 71:15-18
My mouth shall declare thy righteousness, and thy salvation all the day: for I know not the numbers thereof.
Psalm 140:5
The proud have hidden a snare for me, and cords; they have spread a net by the way-side; they have set traps for me. Selah.
Proverbs 10:20-21
The tongue of the righteous man is as choice silver; the heart of the wicked is little worth.
Proverbs 12:18
There is that babbleth like the piercings of a sword; but the tongue of the wise is health.
Proverbs 15:23
A man hath joy by the answer of his mouth; and a word in its season, how good is it!
Proverbs 22:17-18
Incline thine ear, and hear the words of the wise, and apply thy heart unto my knowledge.
Jeremiah 9:2-5
Oh that I had in the wilderness a traveller's lodging-place, that I might leave my people, and go away from them! For they are all adulterers, an assembly of treacherous men.
John 7:38
He that believes on me, as the scripture has said, out of his belly shall flow rivers of living water.
Acts 5:3
But Peter said, Ananias, why has Satan filled thy heart that thou shouldest lie to the Holy Spirit, and put aside for thyself a part of the price of the estate?
2 Corinthians 4:6-7
Because it is the God who spoke that out of darkness light should shine who has shone in our hearts for the shining forth of the knowledge of the glory of God in the face of Jesus Christ.
Ephesians 3:8
To me, less than the least of all saints, has this grace been given, to announce among the nations the glad tidings of the unsearchable riches of the Christ,
Colossians 3:16
Let the word of the Christ dwell in you richly, in all wisdom teaching and admonishing one another, in psalms, hymns, spiritual songs, singing with grace in your hearts to God.
Jude 1:15
to execute judgment against all; and to convict all the ungodly of them of all their works of ungodliness, which they have wrought ungodlily, and of all the hard things which ungodly sinners have spoken against him.