King James Version (KJV)
(Also he bade them teach the children of Judah {the use of} the bow: behold, {it is} written in the book of Jasher.) {of Jasher: or, of the upright}
Modern English
(and he commanded them to teach the children of Judah the song of the bow; behold, it is written in the book of Jashar):
Hebrew
וַיֹּ֕אמֶר לְלַמֵּ֥ד בְּנֵֽי־יְהוּדָ֖ה קָ֑שֶׁת הִנֵּ֥ה כְתוּבָ֖ה עַל־סֵ֥פֶר הַיָּשָֽׁר׃
vayoʾmer llamed bney-yhvdah qashet hineh ktvbah ʿal-seper hayashar