Exodus 26:23-25

Young's Literal Translation

²³ And two boards thou dost make for the corners of the tabernacle in the two sides.

²⁴ And they are pairs beneath, and together they are pairs above its head unto the one ring; so is it for them both, they are for the two corners.

²⁵ And they have been eight boards, and their sockets of silver [are] sixteen sockets, two sockets under the one board, and two sockets under another board.