Exodus 26:23

21and their forty sockets of silver; two sockets under one board, and two sockets under another board.

22For the far side of the tabernacle westward you shall make six boards.

23You shall make two boards for the corners of the tabernacle in the far side.

24They shall be double beneath, and in the same way they shall be whole to its top to one ring: thus shall it be for them both; they shall be for the two corners.

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