Proverbs 15:26

Plans of evil [are] an abomination of Yahweh, but gracious words are pure.

Psalm 19:14

Let the words of my mouth and the meditation of my heart be acceptable in your presence, O Yahweh, 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 is moved [with] a good word; I recite my {compositions} to [the] king. My tongue [is the] pen [of] a skilled scribe.

Proverbs 6:16-19

There are six [things] Yahweh hates, and seven [things are] abominations of his soul:

Proverbs 15:23

Joy [belongs] to a man with answers in his mouth, and a word in its time, how good [it is]!

Proverbs 24:9

Devising folly [is] a sin, and an abomination to humankind [is] a scoffer.

Jeremiah 4:14

Cleanse your heart from wickedness, Jerusalem, so that you may be saved. {How long} will your thoughts of mischief dwell in your inner part?

Matthew 12:34-37

Offspring of vipers! How are you able to say good things [when you] are evil? For from the abundance of the heart the mouth speaks.

Matthew 15:19

For from the heart come evil plans, murder, adultery, sexual immorality, theft, false witness, abusive speech.

Treasury of Scripture Knowledge

Summary

The thoughts of the wicked are an abomination to the LORD: but the words of the pure are pleasant words.

Bible References

Thoughts

Proverbs 6:16
There are six [things] Yahweh hates, and seven [things are] abominations of his soul:
Proverbs 24:9
Devising folly [is] a sin, and an abomination to humankind [is] a scoffer.
Jeremiah 4:14
Cleanse your heart from wickedness, Jerusalem, so that you may be saved. {How long} will your thoughts of mischief dwell in your inner part?
Matthew 15:19
For from the heart come evil plans, murder, adultery, sexual immorality, theft, false witness, abusive speech.