Exodus 26:14-18

And you shall make a covering for the tent of rams’ skins dyed red and a covering of fine leather above. Boards and Bases

“Then you shall make the boards for the tabernacle of acacia wood, standing upright.

Ten cubits shall be the length of each board and one and a half cubits the width of each board.

There shall be two tenons for each board, fitted to one another; that is what you shall do for all the boards of the tabernacle.

You shall make the boards for the tabernacle: twenty boards for the south side.