Adonai spoke to Moses saying,
It was on that very day that Adonai brought Bnei-Yisrael out of the land of Egypt as armies.
“Consecrate to Me all the firstborn, from every womb of Bnei-Yisrael, both men and animals—this is Mine.”
you are to set apart to Adonai every firstborn from the womb, and every firstborn male animal you have will be Adonai’s.
