12. For I will pass through the land of Egypt this night, and will smite all the first-born in the land of Egypt, both man and beast: and against all the gods of Egypt I will execute judgment: I am the LORD.
13. And the blood shall be to you for a token upon the houses where ye are: and when I see the blood, I will pass over you, and the plague shall not be upon you to destroy you, when I smite the land of Egypt.
14. And this day shall be to you for a memorial; and ye shall keep it a feast to the LORD throughout your generations: ye shall keep it a feast by an ordinance for ever.