1 Samuel 18:1-4

When David finished talking with Saul, Jonathan felt very close to David. He loved David as much as he loved himself. Saul kept David with him from that day on and did not let him go home to his father’s house. Jonathan made an agreement with David, because he loved David as much as himself. He took off his coat and gave it to David, along with his armor, including his sword, bow, and belt.