Proverbs 17:3-7

The refining pot is for silver and the furnace for gold, But the Lord tests hearts.

An evildoer listens to wicked lips; A liar pays attention to a destructive tongue.

One who mocks the poor taunts his Maker; One who rejoices at disaster will not go unpunished.

Grandchildren are the crown of the old, And the glory of sons is their fathers.

Excellent speech is not fitting for a fool, Much less are lying lips to a prince.