שמואל א, פרק י״ז, פסוק ל״ג

When a young, untested volunteer offers to face a battle-hardened enemy, the immediate reaction of a leader is rooted in practical caution. Saul evaluates the proposed match through the lens of a realistic military assessment, highlighting the massive gap between the two combatants.

Saul bases his refusal on a double disadvantage. On one side stands David, a young man who has never experienced combat and is completely unfamiliar with military tactics [מצודת דוד, שטיינזלץ]. On the opposing side stands Goliath, a mature warrior at the absolute peak of his power, who has been trained and accustomed to the art of war since his own youth [מלבי״ם, אברבנאל]. This glaring gap in professional experience is made even more intimidating by what is already widely known about the Philistine's massive physical size and immense strength [רלב״ג].

Because of this extreme inequality, Saul's warning carries a much sharper meaning. He is not merely predicting that David will lose the actual battle. Rather, he is stating that the young man will not even be able to muster the strength to march toward the Philistine and stand before him with the intention of fighting [אברבנאל].