Exodus 26:15

King James Version (Oxford) 1769

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

See the chapter Copy

And thou shalt make the boards for the tabernacle, twenty boards on the south side southward.

and rams' skins dyed red, and badgers' skins, and shittim wood,

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