ישעיהו, פרק ד׳, פסוק ד׳

Reaching true holiness is never an automatic process; it demands a profound moral and spiritual cleansing. The survivors in Jerusalem will only achieve this sacred status after God actively purifies the nation from its deep-seated corruption [שד״ל]. God acts much like a father washing the dirt from his children [ביאור שטיינזלץ]. However, this cleansing is not merely gentle; it is driven by strict justice and judgment [חומת אנך].

The purification addresses two distinct types of moral decay, each requiring a different method of removal. First, there is the filth of the daughters of Zion, which represents shameful acts and physical impurities [מצודת ציון, שד״ל]. Although framed around the women of the city following earlier critiques, this actually refers to the wicked deeds of the entire nation [שד״ל]. God washes this filth away with a light rinsing, which [המלבי״ם] explains is sufficient for surface stains like the sin of adultery.

The second type of decay is the blood of Jerusalem. The primary approach among commentators is that this refers to the innocent blood spilled through murder and violent crime. To remove it, God must heavily scrub the city. Unlike a light wash, this scrubbing is a forceful scouring meant for dried, stubborn stains, reflecting the severe and deeply ingrained nature of murder [המלבי״ם]. Offering a different perspective, [שד״ל] suggests the blood is not about murder at all. Instead, it continues the metaphor of Jerusalem as a woman, referring to a natural impurity that must be washed away from within her. Another approach by [חומת אנך] views the easily washed filth as external, public sins that are already known, while the stubbornly attached blood represents internal, hidden sins that have yet to be exposed.

This thorough cleansing takes place in two distinct stages, driven by God's will and decree [רש״י]. Alternatively, this driving force acts like a powerful wind that dries up the lingering moisture of sin [רד״ק, מצודת דוד]. The first stage is a process of judgment, where God evaluates the people through suffering. As [המלבי״ם] emphasizes, this is not a blind or chaotic destruction. Rather, it is a highly precise judgment that carefully separates the pure from the impure, isolating the wicked.

Once this careful sorting is complete, the second stage begins: a process of burning and clearing. Having identified the wicked, God applies severe punishments to completely eradicate them from the world. This final step ensures that evil is entirely consumed, leaving absolutely no trace behind [אבן עזרא, רד״ק, ביאור שטיינזלץ].