Jeremiah 52:20-21

20The two pillars, one sea, and twelve brasen bulls that were under the bases, which king Solomon had made in the house of Yhwh: the brass of all these vessels was without weight.1

21And 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.2