Exodus 36:23 KJV
And he made boards for the tabernacle; twenty boards for the south side southward:
Exodus 36:23, King James Version
In context
22 One board had two tenons, equally distant one from another: thus did he make for all the boards of the tabernacle.
23 And he made boards for the tabernacle; twenty boards for the south side southward:
24 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.