Exodus 27:10
And the pillars of it shall be twenty, and their sockets twenty, of brass. The hooks of the pillars and their bands [shall be] of silver.
Exodus 26:19-21
And thou shall make forty sockets of silver under the twenty boards: two sockets under one board for its two tenons, and two sockets under another board for its two tenons.
Exodus 36:38
and the five pillars of it with their hooks. And he overlaid their capitals and their bands with gold, and their five sockets were of brass.
Jeremiah 52:21
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.