Exodus 8:1 - Divine plague transforms Egypt's waters.

Divine Command and the Role of Aharon

Rashi (Shemot 7:19) explains that Hashem instructed Moshe to tell Aharon to bring about the plague of frogs to teach the principle of "measure for measure." Since the Nile River protected Moshe when he was placed there as an infant (Shemot 2:3), it was not fitting for Moshe to strike it. Instead, Aharon, who had no such connection to the Nile, was chosen to initiate this plague. This reflects the midrashic principle (Mechilta, Bo 12) that Hashem is meticulous in ensuring that even in executing judgment, there is no injustice.

The Extent of the Plague

The verse specifies three types of water sources: neharot (rivers), ye'orim (canals), and agamim (ponds). The Ramban (Shemot 7:19) notes that this comprehensive listing emphasizes that the plague affected all water sources in Mitzrayim, leaving no refuge from the frogs. The Midrash Tanchuma (Va'eira 14) adds that the frogs even entered ovens and kneading bowls, demonstrating the inescapable nature of Divine retribution.

The Symbolism of Frogs

The Malbim explains that frogs, which normally inhabit water, emerging onto dry land represented a disruption of the natural order—a theme recurring in the Ten Plagues. The Talmud (Sanhedrin 67b) also associates frogs with impurity, symbolizing how Mitzrayim's moral corruption necessitated this form of punishment. Additionally, the Midrash (Shemot Rabbah 10:4) teaches that the frogs willingly sacrificed themselves by entering fiery ovens to fulfill Hashem's will, contrasting with Pharaoh's stubborn refusal to submit to Divine authority.

The Rod of Aharon

• Rashi (Shemot 7:19) notes that Aharon's rod was used rather than Moshe's to avoid giving the impression that multiple powers were at work—reinforcing the unity of Hashem's authority.
• The Kli Yakar (Shemot 7:19) adds that the rod symbolized Divine justice, as it had previously turned into a serpent (Shemot 7:10), a sign of Pharaoh's impending downfall.