KJV : And the blood <01818> shall be to you for a token <0226> upon the houses <01004> where ye [are]: and when I see <07200> (8804) the blood <01818>, I will pass <06452> (8804) over you, and the plague <05063> shall not be upon you to destroy <04889> [you], when I smite <05221> (8687) the land <0776> of Egypt <04714>. {to destroy...: Heb. for a destruction}

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NASB :

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NASB# : 'The blood<1818> shall be a sign<226> for you on the houses<1004> where<834><8033> you live; and when I see<7200> the blood<1818> I will pass<6452> over<5921> you, and no<3808> plague<5063> will befall<1961> you to destroy<7843> <I>you</I> when I strike<5221> the land<776> of Egypt<4714>.