6 When the victorious Israelite army was returning home after David had killed the Philistine, women from all the towns of Israel came out to meet King Saul. They sang and danced for joy with tambourines and cymbals. 7 This was their song: "Saul has killed his thousands, and David his ten thousands!" 8 This made Saul very angry. "What's this?" he said. "They credit David with ten thousands and me with only thousands. Next they'll be making him their king!" 9 So from that time on Saul kept a jealous eye on David. 10 The very next day a tormenting spirit from God overwhelmed Saul, and he began to rave in his house like a madman. David was playing the harp, as he did each day. But Saul had a spear in his hand, 11 and he suddenly hurled it at David, intending to pin him to the wall. But David escaped him twice.
Matthew Henry's Commentary on 1 Samuel 18:6-11
Commentary on 1 Samuel 18:6-11
(Read 1 Samuel 18:6-11)
David's troubles not only immediately follow his triumphs, but arise from them; such is the vanity of that which seems greatest in this world. It is a sign that the Spirit of God is departed from men, if, like Saul, they are peevish, envious, suspicious, and ill-natured. Compare David, with his harp in his hand, aiming to serve Saul, and Saul, with his javelin in his hand, aiming to slay David; and observe the sweetness and usefulness of God's persecuted people, and the barbarity of their persecutors. But David's safety must be ascribed to God's providence.