At the Passover, the Lord spared the firstborn of the Israelites. Now the Lord commands that every firstborn, man or animal, be consecrated to Him as a reminder of His gracious deliverance. The Lord leads His people out of Egypt in a pillar of cloud by day and in a pillar of fire by night.
BibleGateway: Exodus 13 ESV Text: Exodus 13 Exodus 13 (Listen) Consecration of the Firstborn 13:1 The LORD said to Moses, 2 “Consecrate to me all the firstborn. Whatever is the first to open the womb among the… At the Passover, the Lord spared the firstborn of the Israelites. Now the Lord commands that every firstborn, man or animal, be consecrated to Him as a reminder of His gracious deliverance. The Lord leads His people out of Egypt in a pillar of cloud by day and in a pillar of fire by night.