Exodus 38:9 (KJV)

And he put the staves into the rings on the sides of the altar, to bear it withal; he made the altar hollow with boards.

And he made the laver of brass, and the foot of it of brass, of the lookingglasses of the women assembling, which assembled at the door of the tabernacle of the congregation.

And he made the court: on the south side southward the hangings of the court were of fine twined linen, an hundred cubits:

Their pillars were twenty, and their brasen sockets twenty; the hooks of the pillars and their fillets were of silver.

And for the north side the hangings were an hundred cubits, their pillars were twenty, and their sockets of brass twenty; the hooks of the pillars and their fillets of silver.