It was at this time that Saul's son, Jonathan, "became one in spirit with David" (1 Samuel 18:1). David and Jonathan's friendship is instructive to friendships today. Though his father was king and Jonathan would have been a natural heir to the throne, Jonathan chose to support David. He understood and accepted God's plan and protected his friend from his murderous father (1 Samuel 18:1–4, 19—20). Jonathan demonstrates humility and selfless love (1 Samuel 18:3; 20:17). During David's reign, after Saul's and Jonathan's deaths, David sought out anyone who remained of the house of Saul to whom he could show kindness for Jonathan’s sake (2 Samuel 9:1). Clearly, both men greatly cared for one another and honored one another.
After the incident with Goliath, David continued to grow in fame. The chant in the camp of Saul was taunting as the people sang out the praises of David and demeaned King Saul, causing a raging jealousy in Saul that never subsided (1 Samuel 18:7–8)