Exodus 26:19-26

19You shall make forty 12sockets of silver under the twenty boards, two 3sockets under one board for its two tenons and two 4sockets under another board for its two tenons; 20and for the second side of the tabernacle, on the north side, twenty boards, 21and their forty 5sockets of silver; two 6sockets under one board and two 7sockets under another board. 22For the 8rear of the tabernacle, to the west, you shall make six boards. 23You shall make two boards for the corners of the tabernacle at the 9rear. 24They shall be double beneath, and together they shall be complete 10to its top 11to the first ring; thus it shall be with both of them: they shall form the two corners. 25There shall be eight boards with their 12sockets of silver, sixteen 13sockets; two 14sockets under one board and two 15sockets under another board.

26“Then you shall make 16bars of acacia wood, five for the boards of one side of the tabernacle,