שמות, פרק י״ג, פסוק ט״ו

Passing down the historical memory of the Exodus from generation to generation serves as the foundation for the commandment to sanctify the firstborn. The narrative is framed as a direct conversation from a father to his son. Moses did not formulate these words independently; rather, God commanded that every father recite this specific message to his children throughout all generations [רשב״ם].

The struggle to leave Egypt is compared to a difficult childbirth. Pharaoh repeatedly changed his mind, agreeing to release the people only in gradual stages, until the final plague acted as the ultimate birth pang that forced him to let them go [שד״ל]. His persistent refusal stemmed from a deep denial of God's absolute ownership over creation. The plague of the firstborn was designed to shatter this stubbornness and demonstrate conclusively that everything belongs to the Creator [רש״ר הירש]. Notably, Pharaoh himself was a firstborn, yet he was miraculously spared from the plague's devastation [העמק דבר, מנחת שי]. On a symbolic level, Pharaoh is compared to an impure animal that must be redeemed by a pure animal, which represents the Israelites. Because Pharaoh refused to redeem himself and release the people, he and his firstborns were met with death [ספורנו].

The plague specifically targeted the males of the nations residing in Egypt. Because the Israelites were also living as guests in the land, their firstborn males technically deserved to perish alongside the locals, but God saved them through a miracle [פני דוד, ספורנו]. For this reason, the commandment of redemption applies exclusively to males and is intended solely for the Israelites [פרדס יוסף]. Through this miraculous rescue, God effectively acquired ownership over the Israelite firstborns [ביאור שטיינזלץ]. They became uniquely sanctified for God's service and were initially forbidden from engaging in secular labor, much like Nazirites. Consequently, the firstborns of pure animal species are sacrificed to honor God [אבן עזרא, ביאור יש״ר]. Human firstborns, however, must be redeemed so that they can be released from this strict sanctity and permitted to perform ordinary everyday work [ספורנו].

To ensure that these open miracles are never forgotten, the Torah commands that the memory of the Exodus be physically bound to the body through the commandment of phylacteries. These miracles serve as permanent testimony to the creation of the world, divine providence, and prophecy, standing firm against heretical beliefs [הטור הארוך]. The phylacteries are placed on the upper arm, directly facing the heart, to symbolize the subjugation of human desires to God's will. The headpiece acts as an ornament of splendor, a symbol of vision, and a constant expression of the desire to align the soul's faculties with God. While instructed to be placed between the eyes, it is not worn on the external space between the eyes, but rather higher up on the head, resting against the brain as the ultimate source of human sight and thought [הכתב והקבלה].