1 Samuel 18:1-4

When David had finished speaking to Saul, the soul of Jonathan was bonded to the soul of David, and Jonathan loved him as himself. Saul took David that day and did not let him return to his father’s house. Then Jonathan made a covenant with David because he loved him as himself. Jonathan stripped himself of the outer robe that he was wearing and gave it to David, with his armor, including his sword, his bow, and his belt.