Exodus 26:25

22 And for the hinder part of the tabernacle westward thou shalt make six boards.

23 And two boards shalt thou make for the corners of the tabernacle in the hinder part.

24 And they shall be double beneath, and in like manner they shall be entire unto the top thereof unto one ring: thus shall it be for them both; they shall be for the two corners.

25 And there shall be eight boards, and their sockets of silver, sixteen sockets; two sockets under one board, and two sockets under another board.

26 And thou shalt make bars of acacia wood: five for the boards of the one side of the tabernacle,

27 and five bars for the boards of the other side of the tabernacle, and five bars for the boards of the side of the tabernacle, for the hinder part westward.

28 And the middle bar in the midst of the boards shall pass through from end to end.