Exodus 36:28

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

And for the sides of the tabernacle westward he made six boards.

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.