God instructs Moses to consecrate every firstborn male in commemoration of the day Israelites were freed from slavery (Exodus 13:1 – 13:16).
God said to Moses, “Consecrate to me every firstborn male. The first offspring of every womb belongs to me, whether human or animal.” Moses said to the people, “Commemorate this day, the day you came out of Egypt, out of the land of slavery, because the Lord brought you out of it with a mighty hand. Eat