The prophet Habakkuk was assured by the Lord that He would deal with the Babylonians after He had used them as an agent of punishment against His own people. He would make His bow “naked,” or take it out of its protective case, in order to use it against the Babylonians.

Baring the bow was a symbol of getting ready for war, just like uncovering the shield (read Isa 22:6)

HABAKKUK 3:9 – Thy [God’s] bow was made quite naked.