1. Select a sheep (צאן) for the family
2. Slaughter the pesach (הפסח)
3. Take hyssop, dip it in the (animal) blood and smear it on the lintel and two doorposts
4. Do NOT go out until dawn
5. The LORD will pass through to smite the Egyptians and will see the blood on the doorposts 
6. The LORD will pesach (פסח) on the door 
7. The LORD will not give the destroyer (משחית) the ability to enter your house to smite (you?)

Exodus 12:21-23 
Here