Capturing Jerusalem from the Jebusites marked a crucial turning point in establishing David's kingdom. For generations, Jebus had remained an unconquered enclave within the land, and the Israelites generally maintained reasonable neighborly relations with its inhabitants. Though the Jebusites were neither a large nation nor renowned warriors, they mounted a fierce resistance when David's army arrived [ביאור שטיינזלץ]. Confident in their strong fortifications, the city's residents challenged David, declaring that he would never be able to breach their walls [מצודת דוד]. The historical record in Chronicles presents a condensed version of this battle, operating on the assumption that the reader is already familiar with the broader narrative from the Book of Samuel. It focuses instead on providing complementary details, such as the fact that the local residents themselves issued this defiant challenge [מלבי״ם, חומת אנך].
The broader account reveals that the Jebusites conditioned David's entry on his ability to remove a unique obstacle involving the blind and the lame. Commentators offer different perspectives on the nature of this barrier. One approach suggests that the Jebusites, realizing they could not defeat David in traditional combat, deliberately positioned people with disabilities at the city gates. They assumed David would consider it beneath his royal dignity to fight the blind and the lame, prompting him to abandon the attack and turn back [רש״י]. Another perspective offers a technological explanation, proposing that these were not actual people, but mechanical figures constructed to look like the blind and the lame. These mechanical dolls were equipped with large iron clubs and were continuously powered by a steady stream of water flowing through a pipe, creating an impassable barrier at the entrance [רלב״ג].
Faced with this blocked gate, David was forced to alter his strategy. Recognizing that a direct assault was impossible, he decided to bypass the obstruction and attack the fortress from a different angle [מלבי״ם]. To neutralize the barrier, whether it consisted of actual people he wished to avoid fighting or dangerous mechanical figures, David offered a massive incentive. He promised that whoever successfully struck the Jebusites and reached the water pipe to disable the system or clear the blockage would be appointed as the commander of his army. Joab the son of Zeruiah took up the challenge, successfully completed the mission, and earned the prestigious rank [רש״י, רלב״ג]. Ultimately, David captured the stronghold of Zion, a heavily fortified structure [מצודת דוד, מצודת ציון] located just north of Jebus and south of the Temple Mount [ביאור שטיינזלץ]. Following this decisive victory, the fortress was renamed the City of David in honor of the king [מצודת דוד, ביאור שטיינזלץ].