Exodus 12:13

13 And the blood will be a sign on the houses where you are: when I see the blood I will go over you, and no evil will come on you for your destruction, when my hand is on the land of 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 And take your meal dressed as if for a journey, with your shoes on your feet and your sticks in your hands: take it quickly: it is the Lord's Passover.

12 For on that night I will go through the land of Egypt, sending death on every first male child, of man and of beast, and judging all the gods of Egypt: I am the Lord.

13 And the blood will be a sign on the houses where you are: when I see the blood I will go over you, and no evil will come on you for your destruction, when my hand is on the land of Egypt.

14 And this day is to be kept in your memories: you are to keep it as a feast to the Lord through all your generations, as an order for ever.

15 For seven days let your food be unleavened bread; from the first day no leaven is to be seen in your houses: whoever takes bread with leaven in it, from the first till the seventh day, will be cut off from Israel.