Exodus 38:8

6He made the poles of acacia wood, and overlaid them with bronze.

7He put the poles into the rings on the sides of the altar, with which to carry it. He made it hollow with planks.

8He made the basin of bronze, and its base of bronze, out of the mirrors of the ministering women who ministered at the door of the Tent of Meeting.

9He made the court: for the south side southward the hangings of the court were of fine twined linen, one hundred cubits;

10their pillars were twenty, and their sockets twenty, of bronze; the hooks of the pillars and their fillets were of silver.