Exodus 12:12-14

Young's Literal Translation

¹² and I have passed over through the land of Egypt during this night, and have smitten every first-born in the land of Egypt, from man even unto beast, and on all the gods of Egypt I do judgments; I [am] Jehovah.

¹³ `And the blood hath become a sign for you on the houses where ye [are], and I have seen the blood, and have passed over you, and a plague is not on you for destruction in My smiting in the land of Egypt.

¹⁴ `And this day hath become to you a memorial, and ye have kept it a feast to Jehovah to your generations; -- a statute age-during; ye keep it a feast.