Exodus 36:27 (KJV)

One board had two tenons, equally distant one from another: thus did he make for all the boards of the tabernacle.

And he made boards for the tabernacle; twenty boards for the south side southward:

And forty sockets of silver he made under the twenty boards; two sockets under one board for his two tenons, and two sockets under another board for his two tenons.

And for the other side of the tabernacle, which is toward the north corner, he made twenty boards,

And their forty sockets of silver; two sockets under one board, and two sockets under another board.

And two boards made he for the corners of the tabernacle in the two sides.

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.

And there were eight boards; and their sockets were sixteen sockets of silver, under every board two sockets.

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.