6 Now on their way, when David came back after the destruction of the Philistine, the women came out of all the towns of Israel, with songs and dances, meeting David with melody and joy and instruments of music. 7 And the women, answering one another in their song, said, Saul has put to death his thousands and David his tens of thousands. 8 And Saul was very angry and this saying was unpleasing to him; and he said, They have given David credit for tens of thousands, and to me for only thousands: what more is there for him but the kingdom? 9 And from that day Saul was looking with envy on David.
Matthew Henry's Commentary on 1 Samuel 18:6-9
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.