Proverbs 15:26
The thoughts of the wicked are an abomination to the LORD, but gracious words are pure.
Psalm 19:14
Let the words of my mouth and the meditation of my heart be acceptable in your sight, O LORD, my rock and my redeemer.
Psalm 37:30-31
The mouth of the righteous utters wisdom, and his tongue speaks justice.
Psalm 45:1
My heart overflows with a pleasing theme; I address my verses to the king; my tongue is like the pen of a ready scribe.
Proverbs 6:16-19
There are six things that the LORD hates, seven that are an abomination to him:
Proverbs 15:23
To make an apt answer is a joy to a man, and a word in season, how good it is!
Proverbs 24:9
The devising of folly is sin, and the scoffer is an abomination to mankind.
Jeremiah 4:14
O Jerusalem, wash your heart from evil, that you may be saved. How long shall your wicked thoughts lodge within you?
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.
Matthew 15:19
For out of the heart come evil thoughts, murder, adultery, sexual immorality, theft, false witness, slander.