David's successes against the Philistines, which should have cheered his heart, made him sad, and the devil watched the opportunity to improve his melancholy, as before he bad done.
Related Commentaries of 1 Samuel 19:9
1 Samuel 19:9
9 And the evil spirit from the LORD was upon Saul, as he sat in his house with his javelin in his hand: and David played with his hand.