Viewing verse 19 of Exodus 26 (with context)
Read Full Chapter Ten cubits shall be the length of a board, and a cubit and a half shall be the breadth of one board.
Two tenons shall there be in one board, set in order one against another: thus shalt thou make for all the boards of the tabernacle.*
And thou shalt make the boards for the tabernacle, twenty boards on the south side southward.
And thou shalt make forty sockets of silver 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 second side of the tabernacle on the north side there shall be twenty boards:
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 thou shalt make six boards.