Immediately following his coronation over all the Israelites, David leads his newly united army toward Jerusalem. The timing of this march is highly deliberate. Situated exactly on the border between the territories of the tribe of Judah and the tribe of Benjamin, Jerusalem represents the ideal location to unify the entire kingdom under a single, universally accepted capital [מלבי״ם, רד״ק, אברבנאל].
Upon arriving, David faces the Jebusites, an independent nation dwelling in a heavily fortified and unconquered district of the city [מצודת ציון, אברבנאל]. The inhabitants greet the new king with outright defiance, declaring that he will never enter their stronghold. They issue a strange and mocking condition, claiming that David must first remove the blind and the lame before he can breach their walls.
The primary approach among commentators is to view this bizarre challenge as a rhetorical taunt. The Jebusites possessed such absolute confidence in the sheer strength of their fortress that they boasted even blind and lame guards could successfully defend it. In their eyes, David would have to overcome the absolute weakest of defenders just to set foot inside [מצודת דוד, אברבנאל, ביאור שטיינזלץ, ורד״ק בשם אבן עזרא].
Taking a different perspective, other scholars suggest that the blind and the lame were not living people at all, but rather copper idols. According to this tradition, the Jebusites were descendants of the Philistine king Abimelech. They engraved these idols with the ancient non-aggression pact that Abraham had once sworn to their ancestor. To emphasize that this treaty bound all the Patriarchs, the idols were specifically crafted to resemble a blind man, representing Isaac whose vision failed in his old age, and a lame man, representing Jacob who limped after injuring his thigh. The Jebusites positioned these statues to legally and spiritually block David's advance. David, however, knew that the ancient oath had already expired. It was originally granted to Abimelech, his grandson, and his great-grandson, and by David's time these specified generations had already passed away [רש״י, רלב״ג, רד״ק, אלשיך, חומת אנך].
A third approach interprets these statues as part of an advanced military defense system. In this view, the figures were actually sophisticated mechanical devices stationed at the city gates. Powered by the force of water flowing through connected pipes, these automated machines violently swung heavy iron clubs, creating a massive and deadly physical barrier. The Jebusites asserted that David could not possibly enter unless he somehow deactivated this powerful machinery [רלב״ג, מלבי״ם].
Ultimately, whether referring to a mocking boast, an ancient treaty, or a mechanical defense, the core message of the Jebusites remained the same. Their exaggerated claims and elaborate defenses were simply an expression of their absolute certainty that David would never manage to penetrate their city [מצודת דוד, אברבנאל].