Exodus 13:15-17

New Revised Standard Version Catholic Edition

¹⁵ When Pharaoh stubbornly refused to let us go, the Lord killed all the firstborn in the land of Egypt, from human firstborn to the firstborn of animals. Therefore I sacrifice to the Lord every male that first opens the womb, but every firstborn of my sons I redeem.’ ¹⁶ It shall serve as a sign on your hand and as an emblem^[a] on your forehead that by strength of hand the Lord brought us out of Egypt.”

The Pillars of Cloud and Fire

¹⁷ When Pharaoh let the people go, God did not lead them by way of the land of the Philistines, although that was nearer; for God thought, “If the people face war, they may change their minds and return to Egypt.”