1 Samuel 18:1-4

1When David had finished talking with Saul, Jonathan and David became bound together in close friendship. Jonathan loved David as much as he did his own life.

2Saul retained David on that day and did not allow him to return to his father’s house.

3Jonathan made a covenant with David, for he loved him as much as he did his own life.

4Jonathan took off the robe he was wearing and gave it to David, along with the rest of his gear, including his sword, his bow, and even his belt.