Exodus 26:15 KJV

And thou shalt make boards for the tabernacle of shittim wood standing up.
Exodus 26:15, King James Version

In context

14 And thou shalt make a covering for the tent of rams’ skins dyed red, and a covering above of badgers’ skins.

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

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