Exodus 26:16

The cubit on the one side and the cubit on the other side, of that which remains in the length of the curtains of the tent, shall hang over the sides of the tabernacle on this side and on that side, to cover it.

You shall make a covering for the tent of rams’ skins dyed red, and a covering of sea cow hides above.

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

There shall be two tenons in each board, joined to one another: thus you shall make for all the boards of the tabernacle.

You shall make twenty boards for the tabernacle, for the south side southward.

You shall make forty sockets of silver under the twenty boards; two sockets under one board for its two tenons, and two sockets under another board for its two tenons.