בראשית, פרק ט׳, פסוק י״ג

After the devastating flood, a new world order is established to ease human anxiety about the possibility of another total destruction. A permanent visual symbol is introduced to guarantee the continuation of life, transforming a celestial phenomenon into a living testament of mercy and an enduring agreement between God and the inhabitants of the earth.

The concept of a bow typically brings to mind a weapon of war used to shoot arrows. However, God transforms its meaning entirely. Instead of a tool of destruction, it becomes a symbol of peace. Positioned in the sky with its ends pointing downward toward the earth and lacking a taut string, the bow visually demonstrates that God is no longer aiming His arrows to destroy humanity [רבנו בחיי, חזקוני, קונטרס חיבה יתירה, קאסוטו, שפתי כהן]. While ancient nations often viewed the bow as an omen of doom or a sign of impending war, this perspective is purified, establishing the bow exclusively as a sign of a peaceful agreement [שד״ל, קאסוטו]. Furthermore, its radiant appearance reflects the glory of God, much like the divine revelation described in prophetic visions [רד״ק, חזקוני, נחלת יעקב].

There is a fundamental discussion regarding the origin of this bow. The primary approach among commentators is that it is a standard natural phenomenon caused by the refraction of sunlight through water droplets. Accordingly, it was formed during the original six days of creation, and God simply imbued an existing natural occurrence with a new symbolic meaning that it did not previously hold [אבן עזרא, ספורנו, רבנו בחיי, ביאור יש״ר, רש״ר הירש, קאסוטו, מחוקקי יהודה]. Conversely, other commentators suggest that this was a completely new creation or a fundamental change in nature. According to this view, before the flood, the clouds were too thick and dense, or the atmospheric rain system functioned differently, preventing the bow from ever forming. Only after the flood, when the air purified and the clouds thinned, could the sun's rays finally penetrate to produce this visual marvel for the first time [מלבי״ם, הכתב והקבלה, תולדות יצחק, לבוש האורה]. Regardless of its origin, its placement in the sky serves as an absolute promise and a divine gift, carrying the unbreakable weight of an oath [רבנו בחיי].

The specific setting of the bow within the clouds carries profound meaning. It is formed through the union of two opposing elements: the fire of the sun's heat and the water of the rain. The fact that these opposing forces can peacefully coexist without destroying one another serves as a powerful indicator of harmony in the world, reassuring humanity that water will never again ruin the earth [ריב״א, חזקוני]. Additionally, while clouds often act as a screen concealing divine abundance from the world, the bow proves that even through this concealment, God's light continues to shine [נחלת יעקב].

As a tangible sign, the bow is placed before both parties to serve as a mutual reminder of their established agreement [רבנו בחיי, ביאור יש״ר, קאסוטו]. Interestingly, it does not appear during every rainfall. Rather, it reveals itself specifically during times when a generation has sinned and is deserving of destruction. Its appearance is intended to awaken humanity to repentance, demonstrating that God is holding back strict justice solely because of His promise. For this reason, during generations graced by perfectly righteous individuals whose personal merits protected their contemporaries, such as Rabbi Shimon bar Yochai, the bow was never seen at all, as no external sign was necessary to save the world [ספורנו, רבנו בחיי, שפתי כהן, פרדס יוסף].