4 Bible Verses about Hollowness

Thou shall make it hollow with planks. As it has been shown thee on the mount, so shall they make it.

And he put the staves into the rings on the sides of the altar, with which to bear it; he made it hollow with planks.

For he fashioned the two pillars of brass, eighteen cubits high apiece. And a line of twelve cubits encompassed each of them around.

And as for the pillars, the height of the one pillar was eighteen cubits, and a line of twelve cubits encompassed it, and the thickness of it was four fingers; it was hollow.