Exodus

²¹Ten cubits was the length of a board, and a cubit and a half the breadth of each board. ²²Each board had two tenons, joined one to another: thus did he make for all the boards of the tabernacle. ²³And he made the boards for the tabernacle; twenty boards for the south side southward: ²⁴and he made 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. ²⁵And for the second side of the tabernacle, on the north side, he made twenty boards, ²⁶and their forty sockets of silver; two sockets under one board, and two sockets under another board. ²⁷And for the hinder part of the tabernacle westward he made six boards.