Exodus 36:25-27

Young's Literal Translation

²⁵ And for the second side of the tabernacle, for the north side, he hath made twenty boards,

²⁶ and their forty sockets of silver, two sockets under the one board, and two sockets under the other board;

²⁷ and for the sides of the tabernacle, westward, hath he made six boards;