The king stubbornly refused to set us free, so the LORD killed the firstborn male of every animal and the firstborn son of every Egyptian family. This is why we sacrifice to the LORD every firstborn male of every animal and save every firstborn son.”
On the way the LORD said to Moses: When you get to Egypt, go to the king and work the miracles I have shown you. But I will make him so stubborn that he will refuse to let my people go.
The LORD God told Moses: Soon you will see what I will do to the king. Because of my mighty power, he will let my people go, and he will even chase them out of his country.