Exodus 38:5-7

Wycliffe Bible

⁵ And he melted out four rings, by so many ends of the griddle, to put in the bars [for] to bear it; (And he made four bronze rings, to fasten to the four corners of the griddle, for the bars to be put through, to carry it;)

⁶ and he made those same bars of the wood of shittim, and covered them with plates of brass. (and he made those bars out of shittim wood, and covered them with bronze plates.)

⁷ And he led them into the rings that stood forth in the sides of the altar. Forsooth that altar was not firm, but hollow of the building of the boards, and void within. (And he put them through the rings that were fastened to the sides of the altar. And that altar was not solid, but hollow, having been built out of boards, and so was empty within.)