Exodus 36:20-24 English Revised Version (ERV)

20. And he made the boards for the tabernacle of acacia wood, standing up.

21. Ten cubits was the length of a board, and a cubit and a half the breadth of each board.

22. Each board had two tenons, joined one to another: thus did he make for all the boards of the tabernacle.

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

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

Exodus 36