Exodus 12:13

13 But the blood on your houses will be a sign for your protection. When I see the blood, I will pass over you. Nothing will touch or destroy you when I strike Egypt.

Exodus 12:13 Meaning and Commentary

Exodus 12:13

And the blood shall be to you for a token upon the houses
where you are
The blood of the passover lamb being sprinkled on the two sideposts and upper doorposts of the houses inhabited by the Israelites, or where they were eating the passover; this should be a sign or token to them of the Lord's making good his promises, to them, and so of their safety, and to the destroying angel not to enter therein, but pass by and save them:

and when I see the blood, I will pass over you;
for which reason this ordinance now instituted was called the passover, because the Lord, on sight of the blood sprinkled, passed over the houses of the Israelites to those of the Egyptians; or "leaped", as Jarchi says, the word signifies, skipped from one Egyptian house to another, passing by that of the Israelites:

and the plague shall not be upon you, to destroy you, when I smite the
land of Egypt,
the pestilence with which the firstborn should be destroyed.

Exodus 12:13 In-Context

11 This is how [you should be dressed when] you eat it: with your belt on, your sandals on your feet, and your shepherd's staff in your hand. You must eat it in a hurry. It is the LORD's Passover.

12 "On that same night I will go throughout Egypt and kill every firstborn male, both human and animal. I will severely punish all the gods of Egypt, [because] I am the LORD.

13 But the blood on your houses will be a sign for your protection. When I see the blood, I will pass over you. Nothing will touch or destroy you when I strike Egypt.

14 "This day will be one for you to remember. This is a permanent law for generations to come: You will celebrate this day as a pilgrimage festival in the LORD's honor.

15 For seven days you must eat unleavened bread. On the very first day you must remove any yeast that you have in your houses. Whoever eats anything with yeast in it from the first day through the seventh day must be excluded from Israel.