Proverbs 15:26
Evil devices are an abomination to LORD, but pleasant words [are] pure.
Psalm 19:14
Let the words of my mouth and the meditation of my heart be acceptable in thy sight, O LORD, my rock, and my redeemer.
Psalm 37:30-31
The mouth of a righteous man talks of wisdom, and his tongue speaks justice.
Psalm 45:1
My heart overflows with a good matter. I speak the things which I have made concerning the king. My tongue is the pen of a ready writer.
Proverbs 6:16-19
There are six things which LORD hates, yea, seven which are an abomination to him:
Proverbs 15:23
A man has joy in the answer of his mouth, and a word in due season, how good it is!
Proverbs 24:9
The thought of folly is sin. And the scoffer is an abomination to men.
Matthew 12:34-37
Ye offspring of vipers, how can ye, being evil, speak good things? For out of the abundance of the heart the mouth speaks.
Matthew 15:19
For from the heart comes forth evil thoughts, murders, adulteries, fornications, thefts, FALSE witnessings, revilings.