Exodus 36:28-30

Young's Literal Translation

²⁸ and two boards hath he made for the corners of the tabernacle, in the two sides;

²⁹ and they have been twins below, and together they are twins at its head, at the one ring; so he hath done to both of them at the two corners;

³⁰ and there have been eight boards; and their sockets of silver [are] sixteen sockets, two sockets under the one board.