זכריה, פרק י״ג, פסוק א׳

The future era of redemption promises a profound transformation for the holy city and its inhabitants, marked by a miraculous source of cleansing. This anticipated event brings a fundamental shift in purity, understood by commentators as either a tangible physical change to the landscape, a deep spiritual awakening, or a combination of both.

The primary approach among commentators envisions a physical reality. Historically, Jerusalem lacked natural springs within its walls, forcing residents to travel outside to draw the fresh, flowing water required for certain rituals. To ease this burden in the future, a natural spring of living water will miraculously break open directly inside the city [רד״ק, אברבנאל, מלבי״ם], flowing continuously [מצודת ציון, מצודת דוד]. This water will serve essential purification needs. It will be used to mix the ashes of the Red Heifer, a ritual requiring fresh, flowing water to cleanse individuals who have come into contact with the dead [רש״י, מצודת דוד, מצודת ציון, ביאור שטיינזלץ]. Additionally, the fresh waters will provide a place of immersion for women requiring purification [רד״ק, אברבנאל, מצודת דוד], though some view these descriptions simply as synonymous references to the purifying waters of the Red Heifer [מצודת דוד, ביאור שטיינזלץ].

Alongside this physical understanding, another perspective views the spring as a profound metaphor. The flowing waters represent an outpouring of Torah, wisdom, and genuine faith emerging from Jerusalem and the Messianic king [מלבי״ם, אברבנאל בשם תרגום יונתן]. Rather than washing the body, these waters will cleanse the soul and mind. They will wash away foreign ideas, ignorance, and idolatry, replacing a spirit of impurity with a spirit of holiness [אבן עזרא בשם ר' משה הכהן, מלבי״ם]. Ultimately, this spring of divine knowledge will overflow beyond the borders of Jerusalem, spreading the awareness of God to the entire world [מלבי״ם].

Offering a unique perspective, another interpretation focuses on a complete reversal of the city's global standing. In the past, the nations of the world viewed Jerusalem with contempt, treating it as something sinful and impure. In the era of redemption, this reality will turn upside down. Rather than standing as a symbol of impurity, the city itself will become an open source of faith and wisdom that will purify the world and entirely wipe out idolatry from the earth [אברבנאל].