1 Samuel 18:14-15, 30

And David behaved himself wisely in all his ways; and the LORD was with him. Wherefore when Saul saw that he behaved himself very wisely, he was afraid of him.

Then the princes of the Philistines went forth: and it came to pass, after they went forth, that David behaved himself more wisely than all the servants of Saul; so that his name was much set by.