Parallel
2 Samuel 1:18
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
(Also he bade them teach the children of Judah the use of the bow: behold, it is written in the book of Jasher (note: Or, of the upright).)
and he ordered that the sons of Judah be taught the Song of the Bow. It is written in the Book of Jashar (note: Or the Book of the Upright One, commonly cited as Jasher; note that the Song of the Bow that follows is not found in known manuscripts attributed to Jasher.):