Exodus 26:24 in the King James Version
And they shall be coupled together beneath, and they shall be coupled together above the head of it unto one ring: thus shall it be for them both; they shall be for the two corners.
Context
23 You shall make two boards for the corners of the tabernacle in the far side.
24 They 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.
25 There shall be eight boards, and their sockets of silver, sixteen sockets; two sockets under one board, and two sockets under another board.