1 Samuel 18:1-4

By the time David had finished reporting to Saul, Jonathan was deeply impressed with David—an immediate bond was forged between them. He became totally committed to David. From that point on he would be David’s number-one advocate and friend. Saul received David into his own household that day, no more to return to the home of his father. Jonathan, out of his deep love for David, made a covenant with him. He formalized it with solemn gifts: his own royal robe and weapons—armor, sword, bow, and belt.