Exodus 36:19-23

And he made a covering for the tent of rams’ skins dyed red, and a covering of fine leather above.

Then he made the boards for the tabernacle of acacia wood, standing upright.

Ten cubits was the length of each board, and one and a half cubits the width of each board.

There were two tenons for each board, fitted to one another; he did this to all the boards of the tabernacle.

So he made the boards for the tabernacle: twenty boards for the south side;