EXO 12:7

7 And they shall take of his blood, and they shall put it on ever either (door)post, and in the lintels, or higher thresholds, of the houses, in which they shall eat him; (And they shall take some of his blood, and they shall put it on both doorposts, and on the lintels, or the upper thresholds, of the houses, in which they shall eat the lamb;)