'Sideposts' in the Bible
And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it.
And ye shall take a bunch of hyssop, and dip it in the blood that is in the bason, and strike the lintel and the two side posts with the blood that is in the bason; and none of you shall go out at the door of his house until the morning.
For the LORD will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two side posts, the LORD will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you.
and hast written them on the side-posts of thy house, and on thy gates,
And Samson lieth down till the middle of the night, and riseth in the middle of the night, and layeth hold on the doors of the gate of the city, and on the two side posts, and removeth them with the bar, and putteth on his shoulders, and taketh them up unto the top of the hill, which is on the front of Hebron.
And for the entering of the oracle he made doors of olive tree: the lintel and side posts were a fifth part of the wall.
And so he hath made for the opening of the temple, side-posts of the oil-tree, from the fourth.
And all the openings and the side-posts are square -- windows; and sight is over-against sight three times.