That same night I will pass through Egypt and kill the first-born son in every family and the first-born male of all animals. I am the LORD, and I will punish the gods of Egypt.
The king stubbornly refused to set us free, so the LORD killed the first-born male of every animal and the first-born son of every Egyptian family. This is why we sacrifice to the LORD every first-born male of every animal and save every first-born son."