And David lamented with this lamentation over Saul and over Jonathan his son:

Jamieson-Fausset-Brown Bible Commentary

2Sa 1:17-27. David Laments Saul and Jonathan.

17, 18. David lamented with this lamentation-It has always been customary for Eastern people, on the death of great kings and warriors, to celebrate their qualities and deeds in funeral songs. This inimitable pathetic elegy is supposed by many writers to have become a national war song, and to have been taught to the young Israelites under the name of "The Bow," in conformity with the practice of Hebrew and many classical writers in giving titles to their songs from the principal theme (Ps 22:1; 56:1; 60:1; 80:1; 100:1). Although the words "the use of" are a supplement by our translators, they may be rightly introduced, for the natural sense of this parenthetical verse is, that David took immediate measures for instructing the people in the knowledge and practice of archery, their great inferiority to the enemy in this military arm having been the main cause of the late national disaster.

Matthew Henry's Concise Commentary

1:17-27 Kasheth, or the bow, probably was the title of this mournful, funeral song. David does not commend Saul for what he was not; and says nothing of his piety or goodness. Jonathan was a dutiful son, Saul an affectionate father, therefore dear to each other. David had reason to say, that Jonathan's love to him was wonderful. Next to the love between Christ and his people, that affection which springs form it, produces the strongest friendship. The trouble of the Lord's people, and triumphs of his enemies, will always grieve true believers, whatever advantages they may obtain by them.