Exodus 36:29-32

And they were coupled beneath, and coupled together at the head thereof, to one ring: thus he did to both of them in both the corners. {coupled: Heb. twinned} And there were eight boards; and their sockets {were} sixteen sockets of silver, under every board two sockets. {under...: Heb. two sockets, two sockets under one board} And he made bars of shittim wood; five for the boards of the one side of the tabernacle, And five bars for the boards of the other side of the tabernacle, and five bars for the boards of the tabernacle for the sides westward.