Why was Saul jealous of David?

The song

David comes home from the Valley of Elah a hero. Women pour out of the towns of Israel with tambourines and dancing to meet King Saul (1 Samuel 18:6), and they sing a two-line song.

The women sang to one another as they played, and said, “Saul has slain his thousands, and David his ten thousands.”

Saul does the arithmetic. “They have credited David with ten thousands, and they have only credited me with thousands. What can he have more but the kingdom?” (18:8). Then the narrator adds a short, sharp line: “Saul watched David from that day and forward” (18:9). The Hebrew verb comes from the word for eye. From then on, Saul keeps an eye on him.

Did the women mean to insult him?

Probably not. Hebrew poetry likes to answer a number with a bigger one in the second line, and a thousand and ten thousand are a stock pair: “A thousand may fall at your side, and ten thousand at your right hand” (Psalm 91:7), or “How could one chase a thousand, and two put ten thousand to flight” (Deuteronomy 32:30). In that pattern the song honors both men. Saul hears a ranking. He is not the only one. Years later the Philistines quote the same lines twice (21:11; 29:5), and King Achish’s servants even call David “the king of the land.”

A king already told he would lose

The song lands on an old wound. When Saul disobeyed God’s command about the Amalekites, Samuel told him plainly:

Yahweh has torn the kingdom of Israel from you today, and has given it to a neighbor of yours who is better than you.

At the time Samuel named no one. Then Yahweh’s Spirit left Saul, and “an evil spirit from Yahweh troubled him” (16:14). The young man brought in to calm him with the lyre was David, and at first Saul loved him greatly (16:21). Now the king looks at his musician and wonders if he is the neighbor. The text gives the root of it: “Saul was afraid of David, because Yahweh was with him, and had departed from Saul” (18:12). His jealousy is fear with a face.

From jealousy to murder

It escalates fast. The next day, while David plays, Saul hurls his spear: “I will pin David to the wall!” (18:11). He sends David out as a commander of a thousand, hoping the Philistines will finish him. He promises him his elder daughter, Merab, then gives her to another man. When his younger daughter Michal falls in love with David, Saul sets a bride price of a hundred Philistine foreskins, because “Saul thought he would make David fall by the hand of the Philistines” (18:25). David brings two hundred. Every scheme makes David more popular, and “Saul was David’s enemy continually” (18:29). Finally he orders his son and his servants to kill him (19:1).

The heir’s problem

Underneath lies a father’s fear. Jonathan, the crown prince, loves David as himself and has given him his own robe and sword (18:1–4). When Jonathan covers for his friend at the new moon feast, Saul explodes.

For as long as the son of Jesse lives on the earth, you will not be established, nor will your kingdom.

Saul is jealous for his dynasty as much as for himself. He sees what Jonathan refuses to see: David stands between his son and the throne.

Readers differ on Saul: a tragic figure chosen and then abandoned, or a study in a ruler’s paranoia. Many historians note that the story is told from David’s side, to defend his claim to Saul’s crown. What happened when the hunted man had the king at his mercy is told in why David spared Saul’s life.