For the LORD will go about and smite Egypt. And when he seeth the blood upon the upper door post and on the two side posts, he will pass over the door and will not suffer the destroyer to come into your house to plague you.

Then went he in, and measured the door posts, which were two cubits thick: but the door itself was six cubits, and the breadth of the door was seven cubits.

So the priest shall take of the blood of the sin offering, and sprinkle it upon the posts of the house, and upon the four corners of the altar, with the door posts of the innermore court.

Then shall the prince come under the door porch, and stand still without by the door check. So the priests shall offer up his burnt and health offerings. And he shall worship at the door post, and go his way forth again: but the door shall no more be shut till the evening.

And take a bunch of hyssop, and dip it in the blood that is in the basin, and strike it upon the upper post and on the two side posts, and see that none of you go out at the door of his house until the morning.

between the chambers were five cubits. The post of the door within the porch, was one measuring rod.