5 So David went out wherever Saul sent him, and behaved wisely. And Saul set him over the men of war, and he was accepted in the sight of all the people and also in the sight of Saul's servants.
6 Now it had happened as they were coming home, when David was returning from the slaughter of the Philistine, that the women had come out of all the cities of Israel, singing and dancing, to meet King Saul, with tambourines, with joy, and with musical instruments. 7 So the women sang as they danced, and said: "Saul has slain his thousands, And David his ten thousands." 8 Then Saul was very angry, and the saying displeased him; and he said, "They have ascribed to David ten thousands, and to me they have ascribed only thousands. Now what more can he have but the kingdom?" 9 So Saul eyed David from that day forward.
Matthew Henry's Commentary on 1 Samuel 18:5-9
Commentary on 1 Samuel 18:1-5
(Read 1 Samuel 18:1-5)
The friendship of David and Jonathan was the effect of Divine grace, which produces in true believers one heart and one soul, and causes them to love each other. This union of souls is from partaking in the Spirit of Christ. Where God unites hearts, carnal matters are too weak to separate them. Those who love Christ as their own souls, will be willing to join themselves to him in an everlasting covenant. It was certainly a great proof of the power of God's grace in David, that he was able to bear all this respect and honour, without being lifted up above measure.
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.