1 Samuel 18:28-30

28Thus Saul saw and knew that the Lord was with David, and that Michal, Saul’s daughter, loved him;

29and Saul was still more afraid of David. So Saul became David’s enemy continually.

30Then the princes of the Philistines went out to war. And so it was, whenever they went out, that David behaved more wisely than all the servants of Saul, so that his name became highly esteemed.