“(and he commanded them to teach the children of Judah the song of the bow; behold, it is written in the book of Jashar):”
2 Samuel 1:18 (WEB)
Context Reading
16David said to him, “Your blood be on your head, for your mouth has testified against you, saying, ‘I have slain Yahweh’s anointed.’” 17David lamented with this lamentation over Saul and over Jonathan his son 18(and he commanded them to teach the children of Judah the song of the bow; behold, it is written in the book of Jashar): 19“Your glory, Israel, was slain on your high places!How the mighty have fallen! 20Don’t tell it in Gath.Don’t publish it in the streets of Ashkelon,lest the daughters of the Philistines rejoice,lest the daughters of the uncircumcised triumph.