Exodus 26:16

King James Version (Oxford) 1769

Ten cubits shall be the length of a board, and a cubit and a half shall be the breadth of one board.

See the chapter Copy

And thou shalt make boards for the tabernacle of shittim wood standing up.

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.