George Haydock's Catholic Commentary
Psalms 17:35
And thou. Chaldean gives the same sense. "He strengthens," &c. (Calmet) --- Hebrew, "and a brazen bow is broken by my arms." (Montanus) --- Protestants, "a bow of steel." Perhaps not knowing that the ancients had the art of making brass answer the same purposes. See Proclus, Hesiod, &c. (Haydock) --- They made all sorts of weapons of it. Job (xx. 24.) seems even to insinuate that it was harder than iron. Our brass is too brittle. To break a bow, often means to obtain a victory, 1 Kings ii. 4., and Jeremias xlix. 5. (Calmet) --- David gained many over a lion or a bear, over Goliath, &c. (Worthington)