I was expecting Biblical accounts to go under Real Life or Literature or Religion... David was a historical king of Israel, not a Myth, so "Mythology" is not really an appropriate categorization. Archeological proof of this was discovered in 1993 at Tel Dan.

Just wondering whether too bring up a difference between real and (most) fictional BFS. Real life examples of this trope are long, but not noticeably wider than is typical for a sword, in stark contrast to the cricket-bat-esque examples found in fiction. The reason real life bfs are built this way is because a longer sword allows its wielder to strike opponents from further away, while a wider sword offers no real advantage* over a typical blade of comparable length, requires greater strength to use, slows recovery after striking and uses more metal (costing more to both smith and swordsman).

• extra width does potentially make a blade more durable, provided the tang is also widened, and can help make the difference between an attack stopping when it strikes mail and shattering bones/driving mail into flesh, but the width should still be kept to the minimum practical value for use against a typical soldier of the area and era.