'Bow' in the Bible

and he told them to teach the sons of Judah, the song of the bow. Behold, it is written in the Book of Jashar:

“From the blood of the slain, from the fat of the mighty,The bow of Jonathan did not turn back,And the sword of Saul did not return empty.

“He trains my hands for war,So that my arms can bend (pull back) a bow of bronze.