The Lord spoke to Moses:
On that same day the Lord brought the Israelites out of the land of Egypt according to their military divisions.
‘Consecrate every firstborn male to me, the firstborn from every womb among the Israelites, both man and domestic animal; it is mine.’
you are to present to the Lord every firstborn male of the womb. All firstborn offspring of the livestock you own that are males will be the Lord’s.
Then the Lord spoke to Moses: