The Mekhilta, the tannaitic commentary on Exodus, addresses a verse with massive implications for the Exodus narrative. Moses tells Israel in Deuteronomy: "And the Lord said to you: You will not go back this way to Egypt again" (Deuteronomy 17:16). The Torah forbids returning to Egypt. But the rabbis ask — where did God originally say this?
The Mekhilta points to the dramatic moment at the shores of the Red Sea, when the Egyptian army was bearing down on the terrified Israelites. Moses proclaimed: "For your seeing Egypt is only this day. You will see them no more forever" (Exodus 14:13). That statement — delivered in the moment of supreme crisis — was not merely encouragement. It was a Divine decree.
The connection transforms both verses. Moses' words at the Red Sea were not just a pep talk for frightened refugees. They were the original source of a permanent commandment. The promise "you will see them no more forever" became the legal basis for the prohibition against returning to Egypt.
This means the Torah's ban on returning to Egypt was born in a moment of terror. At the very instant when Israel was most tempted to go back — to surrender, to return to slavery rather than face the sea — God sealed the door shut forever. There would be no going back. The Exodus was irreversible, and the Mekhilta shows that the law encoded the trauma.