Exodus 38:6-8

Revised Geneva Translation

⁶ And he made the poles of shittim wood and covered them with copper,

⁷ which he put into the rings, on the sides of the Altar, to bear it. And he made it hollow, with boards.

⁸ Also, he made the pots of copper (and their bases of copper) from the mirrors of the women who assembled and came together at the door of the Tabernacle of the Congregation.