How do we know that God rewards wise behavior?

In 1 Samuel 19, we see David's wise behavior contrasted with Saul's envy and malice. Despite Saul's attempts on David's life, God rewarded David's wisdom by allowing him to gain favour among the people. David's integrity and refusal to retaliate against Saul, even in the face of severe provocation, positioned him in God’s grace. This serves as a reminder that those who walk in wisdom and righteousness will ultimately be recognized and upheld by God, as Proverbs 4:7 notes, 'Wisdom is the principal thing; therefore get wisdom.'