Exodus 36:18-22

And he made fifty taches of brass to couple the tent together, that it might be one.

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

And he made boards for the tabernacle of shittim wood, standing up.

The length of a board was ten cubits, and the breadth of a board one cubit and a half.

One board had two tenons, equally distant one from another: thus did he make for all the boards of the tabernacle.