Proverbs 15:26
The LORD abhorreth the imaginations of the wicked; but pure words are pleasant to him.
Psalm 19:14
Let the words of my mouth and the meditation of my heart be acceptable in thy sight, O LORD; my strength and my redeemer.
Psalm 37:30-31
The mouth of the righteous is exercised in wisdom, and his tongue talketh of judgment.
Psalm 45:1
{To the Chanter, upon Shoshannim, an instruction of the children of Korah; a song of love} My heart is inditing of a good matter; I speak the things which I have made unto the King. My tongue is the pen of a ready writer.
Proverbs 6:16-19
These six things doth the LORD hate, and the seventh he utterly abhorreth:
Proverbs 15:23
A joyful thing it is to a man, when his counsel is followed; and very pleasant is a word spoken in due season.
Proverbs 24:9
The thought of the foolish is sin, and the scornful is an abomination unto men.
Jeremiah 4:14
O Jerusalem, wash thine heart from wickedness, that thou mayest be helped. How long shall thy noisesome thoughts remain with thee?
Matthew 12:34-37
O generation of vipers, how can ye say well, when ye yourselves are evil? For of the abundance of the heart, the mouth speaketh.
Matthew 15:19
For out of the heart come evil thoughts, murder, breaking of wedlock, whoredom, theft, false witness-bearing, blasphemy.