Hollow with boards shalt thou make it; as it was showed thee in the mount, so shall they make it.
And he put the staves into the rings on the sides of the altar, to bear it with; he made the altar hollow with boards.
1 Kings 7:15
He made two pillars of brass, of eighteen cubits high apiece, and a line of twelve cubits did compass each of them about.
And concerning the pillars, the height of one pillar was eighteen cubits; and a fillet of twelve cubits did compass it; and the thickness thereof was four fingers: it was hollow.