Exodus 12:7, 11-12

“Then they shall take some of the blood and put it on the two doorposts and the lintel of the houses in which they eat it.

In this manner you shall eat it: with your belt fastened, your sandals on your feet, and your staff in your hand. And you shall eat it in haste. It is the LORD’s Passover. For I will pass through the land of Egypt that night, and I will strike all the firstborn in the land of Egypt, both man and beast; and on all the gods of Egypt I will execute judgments: I am the LORD.