Read Exodus 13:2 Using Other Translations
Sanctify unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man and of beast: it is mine.
"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."
“Dedicate to me every firstborn among the Israelites. The first offspring to be born, of both humans and animals, belongs to me.”