Exodus 26:18 ASV

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

¹⁷  Two tenons shall there be in each board, joined one to another: thus shalt thou make for all the boards of the tabernacle.

¹⁸  And thou shalt make the boards for the tabernacle, twenty boards for the south side southward.

¹⁹  And thou shalt 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.

²⁰  And for the second side of the tabernacle, on the north side, twenty boards,