King David attributes his extraordinary military success entirely to God, presenting himself as the ultimate warrior who possesses a rare blend of acquired skill and immense physical strength. While philosophers debate whether the greatest fighter is one born with natural power or one who masters strategy and tactics, David credits God with granting him both of these ideal traits [אברבנאל]. His deep knowledge of warfare and battlefield strategy was a direct divine gift [מצודת דוד].
Alongside his tactical brilliance, David possessed astonishing physical power. This strength is vividly illustrated by his ability to handle a bow made of a remarkably hard metal, such as copper or iron [רד״ק, רלב״ג]. Wielding such a weapon was vastly more difficult than using a standard wooden bow [ביאור שטיינזלץ]. The primary approach among commentators suggests that David's God-given strength was so immense that when he would draw back the string of this metal weapon to shoot, the bow itself would shatter in his hands [מצודת דוד, רד״ק, מצודת ציון]. A fascinating tradition recounts that David kept these massive, heavy bows hanging in his home. When foreign kings visited, they assumed the weapons were merely decorative pieces meant to intimidate guests. In response, David would take the bows and break them right in front of his visitors to prove his genuine might [רש״י].
Other perspectives view his interaction with the metal weapon differently. Some explain that his strength simply allowed him to successfully bend and draw the heavy metal bow, pulling the string to the precise point needed to fire an arrow [רלב״ג]. Alternatively, the imagery might describe David's own body rather than the weapon itself. In this view, God strengthened and hardened David's arms until they were as rigid and unbreakable as a metal bow [ביאור שטיינזלץ]. Reflecting this idea, an ancient tradition notes that it would have been easier to bend a solid copper bow than to bend David's arms [אברבנאל].
On a deeper, spiritual level, the metal weapon serves as a symbol for the primeval serpent and the destructive sin of harmful speech, a transgression known to cause downfalls on the battlefield. According to this thought process, David declares that his military triumphs and safe returns were not merely the result of physical prowess. Rather, his success stemmed from conquering the influence of the serpent by strictly avoiding harmful speech, thereby protecting himself from the divine punishment of the turning sword and the deadly dangers of war [אהבת יהונתן].