'Two leaved' in the Bible

And he buildeth Beth-Horon the upper, and Beth-Horon the lower -- cities of defence, with walls, two-leaved doors, and bar --

And he saith to Judah, 'Let us build these cities, and compass them with wall, and towers, two-leaved doors, and bars, while the land is before us, because we have sought Jehovah our God, we have sought, and He giveth rest to us round about;' and they build and prosper.