And the blood shall be unto you for a sign in the houses where you shall be: and I shall see the blood, and shall pass over you: and the plague shall not be upon you to destroy you, when I shall strike the land of Egypt.

And the blood shall be for you as a sign on the houses in which ye are; and when I see the blood, I will pass over you; and the plague shall not be among you for destruction, when I smite the land of Egypt.

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.

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.

But the blood will be for you as a sign in the buildings where you will be. And I will see the blood, and I will pass over you. And the plague will not be with you to destroy, when I strike the land of Egypt.

Et erit sanguis vobis in signum per domos in quibus vos fueritis: et videns sanguinem ipsum transiliam vos: nec erit in vobis plaga interitus quum percutiam terram Aegypti.

The blood shall be to you for a token - It shall be the sign to the destroying angel, that the house on which he sees this blood sprinkled is under the protection of God, and that no person in it is to be injured. See Clarke on Exodus 12:11 (note).

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.

To the Israelites, on the other hand, the blood upon the houses in which they were assembled would be a sign and pledge that Jehovah would spare them, and no plague should fall upon them to destroy (cf. Ezekiel 21:31; not "for the destroyer," for there is no article with למשׁחית).