Exodus 26:16 WEB

¹⁴  You shall make a covering for the tent of rams' skins dyed red, and a covering of sea cow hides above.

¹⁵  'You shall make the boards for the tent of acacia wood, standing up.

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

¹⁷  There shall be two tenons in each board, joined to one another: thus shall you make for all the boards of the tent.

¹⁸  You shall make the boards for the tent, twenty boards for the south side southward.