Exodus 12:13

ASV_Strongs(i)
  13 H1818 And the blood H226 shall be to you for a token H1004 upon the houses H7200 where ye are: and when I see H1818 the blood, H6452 I will pass H5063 over you, and there shall no plague H4889 be upon you to destroy H5221 you, when I smite H776 the land H4714 of Egypt.