The answer is: A cattle prod

Jdg 3:31 - The jawbone of the donkey, although also unusual, was the weapon of choice for Samson who slew 1,000 men. The "ox goad" (as written in many versions) was a long wooden pole with a metal point used for prodding the oxen to drive them.

When we think of epic battles in the Bible, our minds might conjure images of swords, shields, and grand armies. Yet, here comes Shamgar, brandishing not the mighty sword of a seasoned warrior, but an unassuming cattle prod—a common agricultural tool of the time. This ox goad, sharp on one end and hefty on the other, was an ideal choice for a surprising hero of the Israelites during a time of oppression by the Philistines.

It's worth noting how the Bible often hints at the extraordinary emerging from the ordinary. Though Shamgar only has two verses dedicated to his exploits (Judges 3:31), his feat stands as a testament to the power of faith and resourcefulness. His story echoes that of David, who faced Goliath not with armor but with just a slingshot and five smooth stones. These narratives reflect a recurring theme: it's not the weapon that defines a hero, but their spirit and reliance on a higher purpose.

Additionally, Shamgar’s battle against 600 Philistines adds him to an intriguing lineup of Biblical figures who defied the odds with unconventional strategies. Both he and Samson remind us that divine support often comes to those who step up with whatever they have, transforming humility into victory. In the grand tapestry of scripture, each of these unique narratives invites contemplation about the true nature of strength and calling rather than merely physical might.