Exodus 36:24 KJV
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.
Exodus 36:24, King James Version
In context
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.
25 And for the other side of the tabernacle, which is toward the north corner, he made twenty boards,