1 Samuel 18:5-9

Saul sent David to fight in different battles, and David was very successful. Then Saul put David over the soldiers, which pleased Saul’s officers and all the other people. After David had killed the Philistine, he and the men returned home. Women came out from all the towns of Israel to meet King Saul. They sang songs of joy, danced, and played tambourines and stringed instruments. As they played, they sang, “Saul has killed thousands of his enemies, but David has killed tens of thousands.” The women’s song upset Saul, and he became very angry. He thought, “The women say David has killed tens of thousands, but they say I have killed only thousands. The only thing left for him to have is the kingdom!” So Saul watched David closely from then on, because he was jealous.