6 As they were coming home, when David returned from slaying the Philistine, the women came out of all the cities of Israel, singing and dancing, to meet King Saul, with timbrels, with songs of joy, and with instruments of music. 7 And the women sang to one another as they made merry, "Saul has slain his thousands, and David his ten thousands." 8 And Saul was very angry, and this saying displeased him; he said, "They have ascribed to David ten thousands, and to me they have ascribed thousands; and what more can he have but the kingdom?" 9 And Saul eyed David from that day on. 10 And on the morrow an evil spirit from God rushed upon Saul, and he raved within his house, while David was playing the lyre, as he did day by day. Saul had his spear in his hand; 11 and Saul cast the spear, for he thought, "I will pin David to the wall." But David evaded 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.