1 Samuel 18:1-9 (HCSB)
When David had finished speaking with Saul, Jonathan committed himself to David, and loved him as much as he loved himself. Saul kept David with him from that day on and did not let him return to his father’s house.
Jonathan made a covenant with David because he loved him as much as himself. Then Jonathan removed the robe he was wearing and gave it to David, along with his military tunic, his sword, his bow, and his belt.
David marched out with the army and was successful in everything Saul sent him to do. Saul put him in command of the soldiers, which pleased all the people and Saul’s servants as well.
As the troops were coming back, when David was returning from killing the Philistine, the women came out from all the cities of Israel to meet King Saul, singing and dancing with tambourines, with shouts of joy, and with three-stringed instruments. As they celebrated, the women sang:
Saul has killed his thousands, but David his tens of thousands.
Saul was furious and resented this song. “They credited tens of thousands to David,” he complained, “but they only credited me with thousands. What more can he have but the kingdom?” So Saul watched David jealously from that day forward.