Exodus 13:1 The LORD said to Moses, “Consecrate to me all the firstborn. Whatever is the first to open the womb among the people of Israel, both of man and of beast, is mine.” Then Moses said to the people, “Remember this day in which you came out from Egypt, out of the house of slavery, for by a strong hand the LORD brought you out from this place. No leavened bread shall be eaten. Today, in the month of Abib, you are going out. And when the LORD brings you into the land of the Canaanites, the Hittites, the Amorites, the Hivites, and the Jebusites, which he swore to your fathers to give you, a land flowing with milk and honey, you shall keep this service in this month. Seven days you shall eat unleavened bread, and on the seventh day there shall be a feast to the LORD. Unleavened bread shall be eaten for seven days; no leavened bread shall be seen with you, and no leaven shall be seen with you in all your territory. You shall tell your son on that day, ‘It is because of what the LORD did for me when I came out of Egypt.’ And it shall be to you as a sign on your hand and as a memorial between your eyes, that the law of the LORD may be in your mouth. For with a strong hand the LORD has brought you out of Egypt. You shall therefore keep this statute at its appointed time from year to year. “When the LORD brings you into the land of the Canaanites, as he swore to you and your fathers, and shall give it to you, you shall set apart to the LORD all that first opens the womb. All the firstborn of your animals that are males shall be the LORD’s. Every firstborn of a donkey you shall redeem with a lamb, or if you will not redeem it you shall break its neck. Every firstborn of man among your sons you shall redeem. And when in time to come your son asks you, ‘What does this mean?’ you shall say to him, ‘By a strong hand the LORD brought us out of Egypt, from the house of slavery.For when Pharaoh stubbornly refused to let us go, the LORD killed all the firstborn in the land of Egypt, both the firstborn of man and the firstborn of animals. Therefore I sacrifice to the LORD all the males that first open the womb, but all the firstborn of my sons I redeem.’ It shall be as a mark on your hand or frontlets between your eyes, for by a strong hand the LORD brought us out of Egypt.”
“Israel had been saved through the destruction of Egypt’s first-born, and now they were required to dedicate their own first-born as a constant memorial of their deliverance.” (Thomas)
In remembrance of the destruction of the first-born of Egypt, both of man and of beast, and the deliverance of the Israelites out of bondage, the first-born males of the Israelites were set apart to the Lord. By this was set before them, that their lives were preserved through the ransom of the atonement, which in due time was to be made for sin. They were also to consider their lives, thus ransomed from death, as now to be consecrated to the service of God. (Henry)
In connection with the deliverance from death of the Israelite first-born by the blood of the lamb, and still further to fix the remembrance of the historical facts in the mind of the nation, Moses was commissioned to declare all the firstborn of Israel for all future time, and all the firstborn of their domesticated animals “holy to the Lord.” There was, perhaps, already in the minds of men a feeling that peculiar dignity attached to the first-born in each family; and this feeling was now strengthened by the assignment to them of a sacred character. God claimed them, and also the first-born of beasts, as His own. The clean beasts became his by sacrifice; but the unclean ones could not he similarly treated, and therefore had to be “redeemed” (verse 13) by the sacrifice of clean animals in their place. The first-born of men became at the first institution of the new ordinance God’s ministers; but as this system was not intended to continue, it was announced that they too would have to be “redeemed” (verses 13, 15). The exact mode of redeeming them was left to be settled afterwards, and will be found in Numbers 3:40-51; Numbers 18:16 (Unknown)
Remembrance of what God has done is good for the soul. It is good for the mind of man to remember what God has done by His own mighty hand. It is good to remember God’s mercy, grace, and love. A heart and mind that is ever remembering God’s strength, power, love, mercy, refuge, wisdom, holiness, and promises, will act differently than the world, will see things of God, will be continually thanking God, will serve God, will honor and glorify God, and will display humbleness, gentleness, kindness, peace, hope, faith, and love. It is when we are consumed with things of this world and the busyness of life that we allow ourselves to be neglectful and complacent in remembering, following, repenting, obeying, and relying on God. Remembering God’s love, grace, and mercy is not a burden and yet should not be taken lightly. It is not an obligation, and yet, it pours out of the redeemed soul like a floodgate opened and never-ending. Without it the heart and mind will wander away from God on paths that neither honor nor glorify Him.